| Titulo | Fecha | Proveedor | Acceso | Cambio de titulo |
| OECD Studies on Tourism | 2011-2017 | ProQuest Information and Learning | . | . |
| OECD Studies on Water | 2009- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Tax Policy Reviews | 2017- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Tax Policy Studies | 2010- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Taxation Working Papers | 2012- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Territorial Reviews | 2012- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Tourism Papers | 2016-2021 | ProQuest Information and Learning | . | . |
| OECD Tourism Trends and Policies | 2010- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Tourism Trends and Policies | 2022- excepto últimos 6 meses | Ebsco Academic | . | . |
| OECD Trade and Environment Working Papers | 2007- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Trade Policy Papers | 2007- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Trade Policy Studies | 2010-2012 | ProQuest Information and Learning | . | . |
| OECD Urban Studies | 2020- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Working Papers on Finance Insurance and Private Pensions | 2009- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Working Papers on Finance Insurance and Private Pensions | 2020- excepto últimos 6 meses | Ebsco Academic | . | . |
| OECD Working Papers on Fiscal Federalism | 2011- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Working Papers on Fiscal Federalism | 2022- excepto últimos 6 meses | Ebsco Academic | . | . |
| OECD Working Papers on International Investment | 2012- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Working Papers on International Investment | 2022- excepto últimos 6 meses | Ebsco Academic | . | . |
| OECD Working Papers on Public Governance | 2007- | OECD | Gratis | . |
| OECD Working Papers on Public Governance | 2007- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OECD Working Papers on Sovereign Borrowing and Public Debt Management | 2011-2018 | ProQuest Information and Learning | . | . |
| Oecologia | 1968- | Springer | . | . |
| Oecologia | 2000- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oecologia | 1968- excepto últimos 36 meses | JSTOR | . | . |
| Oecologia | 2003- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Oecologia Australis | 2010- | Universidade Federal do Rio de Janeiro | Gratis | Cambio de: Oecologia Brasiliensis |
| Oecologia Brasiliensis | 1995-2009 | Dialnet | Gratis | Cambio a: Oecologia Australis |
| Oecologia Brasiliensis | 1995-2009 | Oecologia Brasiliensis | Gratis | Cambio a: Oecologia Australis |
| Oeconomia | 2011- | Open Edition | Gratis | . |
| Oeconomia Copernicana | 2010- | Nicolaus Copernicus University | Gratis | . |
| Oeconomia Copernicana | 2012- | ProQuest Information and Learning | . | . |
| Oeconomia Copernicana | 2014- | CEEOL | Gratis | . |
| Oeconomia Copernicana | 2014- | Ebsco Academic | . | . |
| Oeconomica | 2013- | Ebsco Academic | . | . |
| Oeconomica Jadertina | 2011- | University of Zadar | Gratis | . |
| Oeconomics of Knowledge | 2009-2015 | Repec | Gratis | . |
| Oeconomics of Knowledge | 2009-2015 | ProQuest Information and Learning | . | . |
| Oeconomicus | 2016- | Ebsco Academic | . | . |
| Oeconomische Nachrichten | 1750-1763 | Gale MOMW | . | . |
| Oedippus | 1990- | Pensoft Publishers | Gratis | . |
| Oedippus | 2015- | Ebsco Academic | . | . |
| Oekonomische Beitraege und Bemerkungen zur Landwirthschaft | 1770-1799 | Gale MOMW | . | . |
| Oekonomische nachrichten | 1773-1779 | Gale MOMW | . | . |
| Oekonomische Nachrichten der Patriotische Gesellschaft in Schlesian | 1773-1784 | Gale MOMW | . | . |
| Oekonomische Neuigkeiten und Verhandlungen | 1801-1850 | Gale MOMW | . | . |
| Oekonomisches Repertorium für Liefland | 1808-1811 | Gale MOMW | . | . |
| OEM | 2019-2019 | ProQuest Information and Learning | . | . |
| OEM Off Highway | 2005-2014 | ProQuest Information and Learning | . | . |
| OEMOffHighway.com | 2012-2014 | ProQuest Information and Learning | . | . |
| OENO One | 2016- | Institut des Sciences de la Vigne et du Vin, ISVV | Gratis | Cambio de: Journal international des sciences de la vigne et du vin |
| Oesterreichische botanische Zeitschrift | 1858-1923 | BioDiversity Heritage Library | Gratis | Cambio a: Plant systematics and evolution |
| Oesterreichische botanische Zeitschrift | 1858-1973 | Springer | . | Cambio a: Plant systematics and evolution |
| Oesterreichische botanische Zeitschrift | 1858-1973 | JSTOR | . | Cambio a: Plant systematics and evolution |
| Oesterreichisches botanisches Wochenblatt | 1851-1857 | BioDiversity Heritage Library | Gratis | Cambio a: Oesterreichische Botanische Zeitschrift |
| Oesterreichisches botanisches Wochenblatt | 1851-1857 | Springer | . | Cambio a: Oesterreichische Botanische Zeitschrift |
| Oesterreichisches botanisches Wochenblatt | 1851-1857 | JSTOR | Gratis | Cambio a: Oesterreichische Botanische Zeitschrift |
| Of Counsel | 2001- | Ebsco Academic | . | . |
| Of Counsel | 1998- | ProQuest Information and Learning | . | . |
| Of Two Minds [BLOG] | 2018- | ProQuest Information and Learning | . | . |
| Off Beat | 1973-2004 | Hong Kong Journals Online | Gratis | . |
| Off Our Backs | 1970-2008 | JSTOR | . | . |
| Off Our Backs | 2001-2008 | Ebsco Academic | . | . |
| Off Our Backs | 1970-2008 | ProQuest Information and Learning | . | . |
| Off the Kuff [Blog] | 2021- | ProQuest Information and Learning | . | . |
| Offa's Dyke Journal | 2019- | JAS Arqueologa | Gratis | . |
| Offaly Express | 2011-2020 | ProQuest Information and Learning | . | . |
| Offarm Farmacia y Sociedad | 2000-2011 | Elsevier España | Gratis | . |
| Offbeat | 2006- | Ebsco Academic | . | . |
| Office | 1993-1993 | ProQuest Information and Learning | . | . |
| OFFICE AUTOMATION | 1980- excepto últimos 6 meses | National Institute of Informatics Japan | Gratis | . |
| OFFICE AUTOMATION | 1980-2001 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| OFFICE AUTOMATION | 2001-2007 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Office Manager Today | 2014-2020 | Ebsco Academic | . | . |
| Office Solutions | 1991-2009 | ProQuest Information and Learning | . | . |
| Office Systems Research Journal | 1999-1999 | Organizational Systems Research Association | Gratis | Cambio a: Information Technology, Learning, and Performance Journal |
| Office Technology Solutions for Image Technology Resellers | 2002- | 101 Communications | Gratis | . |
| Office Technology Today | 2014- | Ebsco Academic | . | . |
| Office World News | 1998-2010 | ProQuest Information and Learning | . | . |
| OfficePro | 1997- | Ebsco Academic | . | . |
| OfficePro | 1998- | ProQuest Information and Learning | . | . |
| Officer Review Magazine | 2004-2013 | Ebsco Academic | . | . |
| Officer The | 1997-2017 | ProQuest Information and Learning | . | . |
| Officer.com | 2012-2021 | ProQuest Information and Learning | . | . |
| Official Board Markets | 1998- | Advanstar Communications Ltd. | Gratis | . |
| Official Board Markets | 2005-2012 | Ebsco Academic | . | . |
| Official Bulletin Series A | 2008-2016 | Ebsco Academic | . | . |
| Official Bulletin Series A and B International Labour Office | 1919-1913 | International Labour Office | Gratis | . |
| Official Circulars of Public Documents and Information | 1840-1852 | Gale MOMW | . | . |
| Official Gazette of the Trades' Unions | 1834 | Gale MOMW | . | . |
| official journal of Congeital Anomalies Research Association of Japan | 1963-1986 | National Institute of Informatics Japan | Gratis | . |
| official journal of Congeital Anomalies Research Association of Japan | 1963-1983 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Official Journal of Japan Society of Ningen Dock | 2005- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Official Journal of the European Union | 2003- | European Union | Gratis | . |
| Official Journal of the Japan Association of Endocrine Surgeons and the Japanese Society of Thyroid Surgery | 2012-2022 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Official Journal of the Japan Association of Endocrine Surgery | 2023- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Official Journal of the Japanese Society of Human Dry Dock | 1986-2005 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Official Journal of the Japanese Society of Interventional Radiology | 2010- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis
selecciones disponibles | . |
| Officiel art | 2010- | Éditions Jalou | Gratis | . |
| Officiel de la mode | 2008-2018 | Jalou Gallery | Gratis | . |
| Officina della Storia | 2008-2015 | Open Edition | Gratis | . |
| Óffnungszeiten Papiere zur Designwissenschaft | 2012- | Fachhochschule Lübeck | Gratis | . |
| Offscreen | 1997- | ProQuest Information and Learning | . | . |
| Offshore | 1995- | PennWell Corporation | Gratis | . |
| Offshore | 1995- excepto últimos 3 meses | Ebsco Academic | . | . |
| Offshore | 2005-2013 | ProQuest Information and Learning | . | . |
| Oficina do Historiador | 2010- | Pontificia Universidade Católica do Rio Grande do Sul | Gratis | . |
| Oficio, revista de historia e interdisciplina | 2013- | Universidad de Guanajuato | Gratis | . |
| Oficios Terrestres | 1995- | Universidad Nacional de la Plata | Gratis | . |
| Oficios Terrestres | 2011- | Universidad Nacional de la Plata | Gratis | . |
| Ofioliti | 1998- | Edizioni ETS | Gratis | . |
| Oftal'mokhirurgiya | 2012- | ProQuest Information and Learning | . | . |
| Oftalmologiceskie vedomosti | 2013- | . | Gratis | . |
| Ogden Standard Examiner | 1991-1997 | ProQuest Information and Learning | . | . |
| Ogigia Revista Electrónica de Estudios Hispanicos | 2011- | Universidad de Valladolid | Gratis | . |
| OGIRISI a New Journal of African Studies | 2008- | AJOL | Gratis | . |
| Oglinda literarã Revista de culturã civilizatie s i atitudine | 2008- | . | Gratis | . |
| Ogrody Nauk i Sztuk | 2013- | Ebsco Academic | . | . |
| OH & S Canada | 1992-2011 | ProQuest Information and Learning | . | . |
| Ohio | 1986-2010 | ProQuest Information and Learning | . | . |
| Ohio beetles bulletin Occasional publication of the Ohio Coleopterists | 2009-2018 | BioDiversity Heritage Library | Gratis | . |
| Ohio Biological Survey notes | 1998-2019 | BioDiversity Heritage Library | Gratis | . |
| Ohio Capital Journal | 2021- | ProQuest Information and Learning | . | . |
| Ohio Cardinal | 1978-2016 | SORA | Gratis | . |
| Ohio CPA Journal | 1994-2002 | Ebsco Academic | . | . |
| Ohio CPA Journal | 1987-2002 | ProQuest Information and Learning | . | . |
| Ohio History | 1887-2004 | Ohio Historical Society | Gratis | . |
| Ohio Journal of Science | 1900-1914 | Ohio State University | Gratis | . |
| Ohio Journal of Science | 2004- | Ebsco Academic | . | . |
| Ohio Journal of Science | 1900-1922 | BioDiversity Heritage Library | Gratis | . |
| Ohio Journal of Science | 2014- | Ohio Academy of Science' | Gratis | . |
| Ohio Journal of Science | 2001- | ProQuest Information and Learning | . | . |
| Ohio Journal of Science | 1909-1922 | BioDiversity Heritage Library | Gratis | . |
| Ohio Libraries | 2000-2005 | ProQuest Information and Learning | . | . |
| Ohio Manufacturer | 1995-1999 | ProQuest Information and Learning | . | . |
| Ohio Media Spectrum | 1998-2014 | Ebsco Academic | . | . |
| Ohio Media Spectrum | 1998-2016 | ProQuest Information and Learning | . | . |
| Ohio Mining Journal | 1882-1898 | Ohio State University | Gratis | . |
| Ohio Mycological Bulletin | 1903-1908 | BioDiversity Heritage Library | Gratis | Cambio a: Mycological Bulletin |
| Ohio Mycological Bulletin | 1903-1903 | JSTOR | Gratis | Cambio a: Mycological Bulletin |
| Ohio naturalist | 1900-1915 | BioDiversity Heritage Library | Gratis | . |
| Ohio naturalist and journal of science | 1900-1912 | Hathitrust | Gratis | Cambio de: O.S.U. naturalist |
| Ohio Nurse | 2019- | ProQuest Information and Learning | . | . |
| Ohio Nurses Review | 2003- | Ebsco Academic | . | . |
| Ohio Nurses Review | 2019- | ProQuest Information and Learning | . | . |
| Ohio Reading Teacher | 2002-2014 | ProQuest Information and Learning | . | . |
| Ohio Sociologist The | 1927-1938 | JSTOR | . | Cambio a: Ohio Valley Sociologist, The |
| Ohio State Journal on Dispute Resolution | 2005- | Ebsco Academic | . | . |
| Ohio State Law Journal | 2000- | Ohio State University, College of Law | Gratis | . |
| Ohio Valley History | 2001- | Project Muse | . | . |
| Ohio Valley Sociologist The | 1938-1944 | JSTOR | . | Cambio de: Ohio Sociologist, The | Cambio a: Sociological Focus |
| Ohioana quarterly | 2014- | . | Gratis | . |
| OHM Obradoiro de historia moderna | 1992- | Universidad de Santiago de Compostela | Gratis | . |
| OIDA international journal of sustainable development | 2010- | Ontario International Development Agency | Gratis | . |
| Oideion Performing Arts Online | 1997-2005 | Research School of Asian, African and Amarindian Studies , Leiden | Gratis | . |
| Oikos | 2000- | Wiley Online Library | . | . |
| Oikos | 1949- excepto últimos 84 meses | JSTOR | . | . |
| Oikos | 1987-2010 | Universidad de Antioquia | Gratis | . |
| Oikos Polis | 2016- | Universidad Autónoma Gabriel René Moreno | Gratis | . |
| Oikos Polis | 2016- | SciELO (Bolivia) | Gratis | . |
| Oikos Polis | 2016-2018 | Revistas Bolivianas | Gratis | . |
| Oikos Publicación del Instituto de Ecología UNAM | 1990-2015 | BioDiversity Heritage Library | Gratis | . |
| Oikos Publicación del Instituto de Ecología UNAM | 1992- | BioDiversity Heritage Library | Gratis | . |
| Oikos Revista de la Escuela de Administración y Economía | 2007- | Dialnet | Gratis | . |
| OIKOS Rio de Janeiro | 2006- | Universidade Federal do Rio de Janeiro | Gratis | . |
| Oikos: Jurnal Kajian Pendidikan Ekonomi dan Ilmu Ekonomi | 2016- | Universitas Pasundan | Gratis | . |
| Oil & Energy Trends | 2012- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oil & fat industries | 1927-1931 | Springer | . | Cambio de: Journal of oil & fat industries | Cambio a: Oil and soap |
| Oil & Gas Interests Newsletter | 1995-2002 | ProQuest Information and Learning | . | . |
| Oil & Gas Investor | 1987- | ProQuest Information and Learning | . | . |
| Oil & Gas Investor This Week | 2007-2010 | Ebsco Academic | . | . |
| Oil & Gas Investor This Week | 1995-2016 | ProQuest Information and Learning | . | . |
| Oil & Gas Journal | 1991-2013 | ProQuest Information and Learning | . | . |
| Oil & Gas News | 2008- | ProQuest Information and Learning | . | . |
| Oil & Gas News | 2011-2011 | ProQuest Information and Learning | . | . |
| Oil & Gas Product News | 2013-2016 | Ebsco Academic | . | . |
| Oil & Gas Review | 2018-2018 | ProQuest Information and Learning | . | . |
| Oil & Gas Science and Technology | 1999-2021 | EDP Sciences | Gratis | Cambio de: Revue de l'Institut français du pétrole | Cambio a: Science and Technology for Energy Transition (STET) |
| Oil & Gas Science and Technology | 2020-2021 | Ebsco Academic | . | Cambio de: Revue de l'Institut français du pétrole | Cambio a: Science and Technology for Energy Transition (STET) |
| Oil & soap | 1932-1946 | Springer | . | Cambio de: Oil & fat industries | Cambio a: Journal of the American Oil Chemists' Society JAOCS |
| Oil and Energy Trends Annual Statistical Review | 2005- | Wiley Online Library | . | . |
| Oil and Energy Trends Annual Statistical Review | 2013- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oil and Gas Technology [BLOG] | 2018- | ProQuest Information and Learning | . | . |
| Oil Crop Science | 2020- | Elsevier Science | Gratis | . |
| Oil Crop Science | 2022- | Ebsco Academic | . | . |
| Oil Crops Outlook | 1995- | U.S. Department of Agriculture | Gratis | . |
| Oil Daily | 2002-2010 | ProQuest Information and Learning | . | . |
| Oil Drilling & Production Technology Shiyou Zuancai Gongyi | 2012- | Ebsco Academic | . | . |
| Oil Gas & Petrochem Equipment | 2005-2006 | ProQuest Information and Learning | . | . |
| Oil Gas Coal & Electricity Quarterly Statistics Electricite charbon gaz et petrole statistiques trimestrielles | 1999- | OECD iLibrary | . | . |
| Oil Gas Coal & Electricity Quarterly Statistics Electricite charbon gaz et petrole statistiques trimestrielles | 2002-2005 | Ebsco Academic | . | . |
| Oil Shale | 2003- | Ebsco Academic | . | . |
| Oil Shale | 2010- | ProQuest Information and Learning | . | . |
| Oil Shale | 2021- | Estonian Academy Publishers | Gratis | . |
| Oil Spill Intelligence Report | 2003-2020 | Ebsco Academic | . | . |
| Oil Spill Intelligence Report | 2004-2020 | ProQuest Information and Learning | . | . |
| OilandGasMiddleEast.com | 2012-2020 | ProQuest Information and Learning | . | . |
| Oilseeds and Fats, Crops and Lipids | 2016-2020 | ProQuest Information and Learning | . | . |
| Oilseeds and Fats, Crops and Lipids | 2000- | EDP Sciences | Gratis | . |
| Oilseeds Focus | 2021- | Ebsco Academic | . | . |
| Oilweek | 1996-2017 | ProQuest Information and Learning | . | . |
| OIT Times Office of Industrial Technologies | 1997-2002 | U.S. Department of Energy, Office of Industrial Technologies | Gratis | . |
| Ojo | 2021- | ProQuest Information and Learning | . | . |
| OJS pa dansk | 2010- | Aarhus Universitet | Gratis | . |
| Okajimas Folia Anatomica Japonica | 1936-2019 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Okamoto Medical Journal | 2023- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| OKARA Geografia em Debate | 2012- | Ebsco Academic | . | . |
| OKARA Geografia em Debate | 2007- | Universidade Federal da Paraíba | Gratis | . |
| Okara: Jurnal Bahasa dan Sastra | 2011- | State College of Islamic Studies Pamekasan (STAIN Pamekasan) | Gratis | . |
| Okayama Daigaku Bungakubu kiy& 333 | 2012- | Okaya University | Gratis | . |
| Okayama Igakkai Zasshi Journal of Okayama Medical Association | 1947- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis
selecciones disponibles | . |
| Okayama Igakkai Zasshi Journal of Okayama Medical Association | 1947- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis
selecciones disponibles | . |
| okayama psychological association presentation and conference paper | 2021- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| OKC Central [The Daily Oklahoman, Oklahoma City, Oklahoma - BLOG] | 2009-2014 | ProQuest Information and Learning | . | . |
| Okeanos | 2018- | Ebsco Academic | . | . |
| Oklahoma archeology Journal of the Oklahoma Anthropological Society | 2002-2005 | Internet Archive | Gratis | . |
| Oklahoma Business Bulletin | 2002-2015 | ProQuest Information and Learning | . | . |
| Oklahoma City University Law Review | 2011- | Ebsco Academic | . | . |
| Oklahoma Dental Association Journal | 2007- | Ebsco Academic | . | . |
| Oklahoma librarian | 1950-2018 | Oklahoma Library Association | Gratis | . |
| Oklahoma Men | 2001-2010 | ProQuest Information and Learning | . | . |
| Oklahoma Native Plant Record | 2001- | Oklahoma State University | Gratis | . |
| Oklahoma nurse | 2004- | Ebsco Academic | . | . |
| Oklahoma nurse | 2019- | ProQuest Information and Learning | . | . |
| Oklahoma Politics | 1992- | Oklahoma State University | Gratis | . |
| Oklahoma Voice [BLOG] | 2023- | ProQuest Information and Learning | . | . |
| Oklahoma Watch [BLOG] | 2018- | ProQuest Information and Learning | . | . |
| Oklahoma Water Resources Research Institute | 1966- | Oklahoma State University | Gratis | . |
| Oklahoma Woman | 2000-2016 | ProQuest Information and Learning | . | . |
| Okmeydani Tip Dergisi Medical Journal of Okmeydani Training & Research Hospital | 2015-2018 | Ebsco Academic | . | . |
| Okologisches Wirtschaften | 2014- | Ebsco Academic | . | . |
| Oksident | 2019- | Dergipark | Gratis | . |
| Oksident | 2021- | Ebsco Academic | . | . |
| Oktjabr | 1996- | Oktjabr | Gratis | . |
| Ola financiera | 2008- | UNAM | Gratis | . |
| Ola financiera | 2015-2015 | SciELO (Mexico) | Gratis | . |
| Ola financiera | 2008- | UNAM | Gratis | . |
| Ola financiera | 2015- | ProQuest Information and Learning | . | . |
| OLA Quarterly | 1995- | Oregon Library Association | Gratis | . |
| OLA Quarterly | 1995- | Ebsco Academic | . | . |
| Olba Journal | 2009- | Ebsco Academic | . | . |
| Olba Journal | 2009- | ProQuest Information and Learning | . | . |
| OLBI Working Papers | 2010- | University of Ottawa | Gratis | . |
| Old Age Psychiatrist | 2016- | Royal College of Pharmacists, Faculty for the Psychiatry of Old Age | Gratis | . |
| Old and New Testament Student | 1889-1892 | JSTOR | . | Cambio de: The Old Testament Student | Cambio a: The Biblical World |
| Old English newsletter | 1998- | University of Tennessee | Gratis | . |
| Old Guard | 1863-1867 | Hathitrust | Gratis | . |
| Old Guard | 1864- | Making of America Project Michigan | Gratis | . |
| Old Potter's Almanack The | 2009- | Universitatsbibliothek Heidelberg | Gratis | . |
| Old Testament Essays | 2008- | SciELO (South Africa) | Gratis | . |
| Old Testament Essays | 2002- | Sabinet | Gratis | . |
| Old Testament Student | 1883-1889 | JSTOR | . | Cambio de: The Hebrew Student | Cambio a: The Old and New Testament Student |
| Old Time Herald | 2009- | Ebsco Academic | . | . |
| Old World Journal of Ancient Africa and Eurasia | 2021- | Brill | Gratis | . |
| Older Americans : a Changing Market | 2009-2009 | ProQuest Information and Learning | . | . |
| Older Americans : a Changing Market | 2012-2012 | ProQuest Information and Learning | . | . |
| Oldman River Dam ... raptor mitigation program | 1990-1993 | BioDiversity Heritage Library | Gratis | . |
| Oldman River Dam Project fisheries evaluation program, ... annual report | 1989-1989 | BioDiversity Heritage Library | Gratis | . |
| Oleoscience | 2001- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Olh@res | 2013- | Universidade Federal de So Paulo | Gratis | . |
| Olhar de Professor | 2001- | Red ALyC | Gratis | . |
| Olhar de Professor | 1998- | Universidade Estadual de Ponta Grossa | Gratis | . |
| Olhares & trilhas | 2000- | Universidade Federal de Uberlândia | Gratis | . |
| Olho d'água | 2009- | Universidade Estadual Paulista | Gratis | . |
| Oligonucleotides | 2008- excepto últimos 12 meses | PubMed Central | Gratis
Artículos selectos | Cambio de: Antisense & nucleic acid drug development | Cambio a: Nucleic acid therapeutics |
| Olimpia | 2014- | Universidad de Granma | Gratis | . |
| Oliva La Periódico de política literatura e intereses materiales | 1856-1892 | Galiciana | Gratis | . |
| Olivar Revista de literatura y cultura españolas | 2006- | Dialnet | Gratis | . |
| Olivar Revista de literatura y cultura españolas | 2001- | SciELO (Argentina) | Gratis | . |
| Olivar Revista de literatura y cultura españolas | 2000- | Universidad Nacional de la Plata | Gratis | . |
| Olivar Revista de literatura y cultura españolas | 2000- | Universidad Nacional de la Plata | Gratis | . |
| Olivar Revista de literatura y cultura españolas | 2000-2019 | ProQuest Information and Learning | . | . |
| Oliviana Mouvements et dissidences spirituels XIIIe XIVe siecles | 2003- | Open Edition | Gratis | . |
| Oliviana Recherches sur Petrus Loannis Olivi et les courants spirituels XIIe Xve siècles | 2003- | Open Edition | Gratis | . |
| Olney Interface timber sale project initial proposal timber sale project | 2008-2008 | BioDiversity Heritage Library | Gratis | . |
| Olsztyn Economic Journal | 2007- | University of Warmia and Mazury in Olsztyn | Gratis | . |
| Oltenia Studii si Comunicari Seria Stiintele Naturii | 2014- | Ebsco Academic | . | . |
| OM & Tiergesundheit | 2022- | Ebsco Academic | . | . |
| Oman Commercial Banking Report | 2010-2017 | ProQuest Information and Learning | . | . |
| Oman Country Review | 2000- | Ebsco Academic | . | . |
| Oman Economic Review (OER) | 2018- | ProQuest Information and Learning | . | . |
| Oman Freight Transport Report | 2009-2016 | ProQuest Information and Learning | . | . |
| Oman Information Technology Report | 2009-2016 | ProQuest Information and Learning | . | . |
| Oman Infrastructure Report | 2009-2017 | ProQuest Information and Learning | . | . |
| Oman Insurance Report | 2009-2016 | ProQuest Information and Learning | . | . |
| Oman Journal of Ophthalmology | 2008- | MedKnow | Gratis | . |
| Oman Journal of Ophthalmology | 2009- | PubMed Central | Gratis | . |
| Oman Journal of Ophthalmology | 2010- | Ebsco Academic | . | . |
| Oman Journal of Ophthalmology | 2008- | ProQuest Information and Learning | . | . |
| Oman Medical Journal | 2007- | Oman Medical Specialty Board | Gratis | . |
| Oman Medical Journal | 2007- | PubMed Central | Gratis | . |
| Oman Medical Journal | 2009- | Ebsco Academic | . | . |
| Oman News Agency | 2009- | ProQuest Information and Learning | . | . |
| Oman Oil & Gas Report | 2020- | Ebsco Academic | . | . |
| Oman Pharmaceuticals & Healthcare Report | 2009-2017 | ProQuest Information and Learning | . | . |
| Oman Telecommunications Report | 2009-2017 | ProQuest Information and Learning | . | . |
| Oman Tourism Report | 2020- | Ebsco Academic | . | . |
| Oman Tribune | 2015-2017 | ProQuest Information and Learning | . | . |
| OMB Watcher Office of Management and Budget | 2000- | OMB Watch | Gratis | . |
| Ombudsman of Spain Summary of the report to Parliament | 2003- | Defensor del Pueblo | Gratis | . |
| Omega HR Solutions | 2016-2021 | ProQuest Information and Learning | . | . |
| Omega Journal of Death & Dying | 1999- | Sage Journals | . | . |
| Omega Oxford | 1973- | Elsevier Science | . | . |
| Omertaa Journal for applied anthropology | 2007- | Omertaa | Gratis | . |
| Ometeca | 2010- | Ebsco Academic | . | . |
| OMICS a Journal of Integrative Biology | 2008- excepto últimos 12 meses | PubMed Central | Gratis
Artículos selectos | Cambio de: Microbial & comparative genomics |
| Omineca Express | 2004-2022 | ProQuest Information and Learning | . | . |
| Omineca Express (Online) | 2023- | ProQuest Information and Learning | . | . |
| Omj | 2000-2006 | Australian Museums & Galleries Online | Gratis | . |
| Omni | 1990-1995 | Ebsco Academic | . | . |
| Omni | 1988-1995 | ProQuest Information and Learning | . | . |
| Omni-Akuatika | 2009- | Jenderal Soedirman University | Gratis | . |
| Omnia | 1995- | Universidad del Zulia | Gratis | . |
| Omnia | 2001- | Red ALyC | Gratis | . |
| Omnibus and Sydney Spectator Australia | 1841-1843 | Australian Cooperative Digitisation Project | Gratis | . |
| Omónoia La Concorde Journal politique littéraire et commercial | 1870-1883 | Gallica. Bibliothèque Nationale Paris | Gratis | . |
| OMUIFD Ondokuz Mayis University Review of the Faculty of Divinity Ondokuz Mayıs Üniversitesi İlahiyat Fakültesi Dergisi | 2011- | Ebsco Academic | . | . |
| On Campus with Women | 1998-2002 | ProQuest Information and Learning | . | . |
| On common ground Strenghtening teaching through school unversity partnership | 1993- | . | Gratis | . |
| ON Magazine | 2001-2002 | Ebsco Academic | . | . |
| On Money [Chicago Tribune - BLOG] | 2011-2011 | ProQuest Information and Learning | . | . |
| On our terms The undergraduate journal of the Athena Center for Leadership Studies | 2013-2015 | Columbia University | Gratis | . |
| On Paper | 1996-1998 | JSTOR | . | Cambio de: Print Collector's Newsletter | Cambio a: Art on Paper |
| On Patrol [The Bellingham Herald - BLOG] | 2010-2010 | ProQuest Information and Learning | . | . |
| On politcs op | 2005- | University of Victoria | Gratis | . |
| On Politics | 2005- | University of Victoria | Gratis | . |
| On Tap magazine | 2001- | National Drinking Water Clearinghouse | Gratis | . |
| On the Horizon | 2000- | Emerald | . | . |
| On the Horizon | 2000- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| On The Issues | 1995-1999 | ProQuest Information and Learning | . | . |
| On The Media | 2001- | ProQuest Information and Learning | . | . |
| On the waterfront | 1998- | RACO | Gratis | . |
| On the waterfront | 1998- | Universitat de Barcelona | Gratis | . |
| On the waterfront | 2010- | Ebsco Academic | . | . |
| On the waterfront Newsletter of the friends of the International Institute of Social History | 2000- | International Institute of Social History | Gratis | . |
| On Thinking | 2009-2011 | Springer Series | . | . |
| On Wall Street | 1999-2016 | Ebsco Academic | . | . |
| On Wall Street | 1998-2016 | ProQuest Information and Learning | . | . |
| On Wall Street (Online) | 2010-2020 | ProQuest Information and Learning | . | . |
| Oñati Socio Legal Series | 2011- | Oñati International Institute for the Sociology of Law | Gratis | . |
| Oncars India | 2013-2018 | ProQuest Information and Learning | . | . |
| Onco | 2021- | MDPI AG | Gratis | . |
| Onco | 2022- | Ebsco Academic | . | . |
| Onco Fertility Journal | 2018- | MedKnow | Gratis | . |
| Oncobiology and Targets | 2014- | Scholastica | Gratis | . |
| Oncogene | 1997- | Nature Publishing Group | . | . |
| Oncogene | 1997- excepto últimos 60 meses | Nature Publishing Group | Gratis | . |
| Oncogene | 1997-2015 | Ebsco Academic | . | . |
| Oncogene | 2000- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Oncogene | 1997- | Springer | . | . |
| Oncogenesis | 2012- | Nature Publishing Group | Gratis | . |
| Oncogenesis | 2012-2021 | PubMed Central | Gratis | . |
| Oncogenesis | 2012- | ProQuest Information and Learning | . | . |
| Oncogenesis | 2013- | Ebsco Academic | . | . |
| Oncogenesis | 2012-2017 | Springer | . | . |
| Oncoimmunology | 2012- excepto últimos 12 meses | Taylor & Francis | Gratis | . |
| Oncoimmunology | 2012- | PubMed Central | Gratis | . |
| Oncoimmunology | 2012-2015 | Ebsco Academic | . | . |
| Oncolog Hematolog | 2013- | Ebsco Academic | . | . |
| Oncolog Hematolog | 2015- | Medichub Media | Gratis | . |
| Oncologia | 1998- | Imbiomed | Gratis
Registro individual requerido | . |
| Oncología Barcelona | 2004-2007 | SciELO (España) | Gratis | . |
| Oncologia Veterinaria | 2001- | Centro Oncologico Veterinario Olivos (Argentina) | Gratis | . |
| Oncologie | 2004-2022 | Ebsco Academic | . | . |
| Oncologie | 2004-2017 | Springer | . | . |
| Oncologie | 2015-2019 | ProQuest Information and Learning | . | . |
| Oncologie | 2023- | de Gruyter | Gratis | . |
| Oncologie | 2019-2022 | Tech Science Press | Gratis | . |
| Oncologist | 2010- | PubMed Central | Gratis | . |
| Oncologist | 1996-2021 | Wiley Online Library | Gratis | . |
| Oncologist | 1996- | Oxford Academic | Gratis | . |
| Oncology | 2008-2012 | PubMed Central | Gratis
Artículos selectos | . |
| Oncology | 1998- | Karger Publishers | . | . |
| Oncology | 1998-2015 | ProQuest Information and Learning | . | . |
| Oncology | 1999- | CMPMedica | Gratis | . |
| Oncology | 2007- | ProQuest Information and Learning | . | . |
| Oncology & Hematology Review | 2013-2013 | Ebsco Academic | . | . |
| Oncology and Therapy | 2013- | Springer | Gratis | Cambio de: Rare cancers and therapy |
| Oncology and Therapy | 2013-2019 | ProQuest Information and Learning | . | Cambio de: Rare cancers and therapy |
| Oncology and Therapy | 2018- | PubMed Central | Gratis | Cambio de: Rare cancers and therapy |
| Oncology Exchange | 2011-2018 | Ebsco Academic | . | . |
| Oncology Fellows | 2020- | ProQuest Information and Learning | . | . |
| Oncology Fellows | 2023- | Ebsco Academic | . | . |
| Oncology Gastroenterology & Hepatology Reports | 2014-2019 | Ebsco Academic | . | . |
| Oncology in Clinical Practice | 2015- | Via Medica | Gratis | Cambio de: Onkologia w Praktyce Klinicznej |
| Oncology Issues | 1997- | Taylor & Francis | . | . |
| Oncology Journal of India | 2017- | MedKnow | Gratis | . |
| Oncology Journal of India | 2022- | Ebsco Academic | . | . |
| Oncology Letters | 2010- | PubMed Central | Gratis | . |
| Oncology Letters | 2013- | Ebsco Academic | . | . |
| Oncology Letters | 2012- | ProQuest Information and Learning | . | . |
| Oncology Live | 2020- | ProQuest Information and Learning | . | . |
| Oncology Live | 2024- | Ebsco Academic | . | . |
| Oncology Nurse Advisor | 2011- | Ebsco Academic | . | . |
| Oncology Nurse Advisor | 2015-2018 | ProQuest Information and Learning | . | . |
| Oncology Nurse APN PA | 2013- | Ebsco Academic | . | . |
| Oncology Nursing Forum | 2000- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oncology Nursing Forum | 2005- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Oncology Nursing News | 2008-2009 | ProQuest Information and Learning | . | . |
| Oncology Practice | 2016- | Frontline Medical Communications, | Gratis | Cambio de: Oncology Report |
| Oncology Practice Management | 2018- | Ebsco Academic | . | . |
| Oncology Report | 2004-2015 | Elsevier Science | Gratis | Cambio a: Oncology Practice |
| Oncology Reports | 2006- excepto últimos 12 meses | Spandidos Publications | Gratis | . |
| Oncology Reports | 2012- excepto últimos 12 meses | PubMed Central | Gratis
Artículos selectos | . |
| Oncology Reports | 2012- | ProQuest Information and Learning | . | . |
| Oncology Research | 2014- | PubMed Central | Gratis | . |
| Oncology Research | 2019- | Tech Science Press | Gratis | . |
| Oncology Research and Treatment | 1998- | Karger Publishers | . | . |
| Oncology Research and Treatment | 2013- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oncology Reviews | 2007-2011 | Springer | . | . |
| Oncology Reviews | 2012- | Frontiers Media S.A. | Gratis | . |
| Oncology Reviews | 2012- | PubMed Central | Gratis | . |
| Oncology Reviews | 2013- | Ebsco Academic | . | . |
| Oncology Reviews | 2012- | ProQuest Information and Learning | . | . |
| Oncology Signaling | 2018-2020 | Elsevier Science | Gratis | . |
| Oncology Times | 2001- | Lippincott Williams & Wilkins | Gratis | . |
| Oncology Times | 2015- | Ovid Technologies, Inc. | . | . |
| Oncology Times UK | 2004-2012 | Ovid Technologies, Inc. | . | . |
| Oncology Times UK | 2004-2012 | Lippincott Williams & Wilkins | Gratis | . |
| Oncolytic Virotherapy | 2012- | Dove Medical Press | Gratis | . |
| Oncolytic Virotherapy | 2012-2021 | PubMed Central | Gratis | . |
| Oncolytic Virotherapy | 2012- | Ebsco Academic | . | . |
| Oncolytic Virotherapy | 2012-2021 | ProQuest Information and Learning | . | . |
| OncoMagazine | 2007-2011 | Springer | . | . |
| OncomiRs | 2012-2012 | Portico | Gratis | . |
| Oncoplastic Breast Surgery | 2016- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Oncoscience | 2014- | Impact Journals | Gratis | . |
| Oncoscience | 2014- | PubMed Central | Gratis | . |
| Oncotarget | 2010- | PubMed Central | Gratis | . |
| Oncotarget | 2010- | Impact Journals | Gratis | . |
| OncoTargets and therapy | 2008- | Dove Medical Press | Gratis | . |
| OncoTargets and therapy | 2008- | PubMed Central | Gratis | . |
| OncoTargets and therapy | 2012- | Ebsco Academic | . | . |
| OncoTargets and therapy | 2008- | ProQuest Information and Learning | . | . |
| OncoTargets and therapy | 2008- | Taylor & Francis | Gratis | . |
| Oncurating org | 2008- | Zurich University | Gratis | . |
| Onderneming en Financiering | 2017- | Ebsco Academic | . | . |
| Onderstepoort Journal of Veterinary Research The | 2008- | SciELO (South Africa) | Gratis | . |
| Onderstepoort Journal of Veterinary Research The | 2003- | AOSIS OpenJournals | Gratis | . |
| Onderstepoort Journal of Veterinary Research The | 1998- | ProQuest Information and Learning | . | . |
| Onderstepoort Journal of Veterinary Research The | 2009- | Ebsco Academic | . | . |
| Onderstepoort Journal of Veterinary Research The | 2015- | PubMed Central | Gratis | . |
| Ondina - Ondine | 2018- | Universidad de Zaragoza | Gratis | . |
| Ondokuz Mayis University Journal of Sports & Performace Researches OMU JSPR Ondokuz Mayis Üniversitesi Spor ve Performans Arastirmalari Dergisi | 2023- | Ebsco Academic | . | . |
| Ondokuzmayis University Journal of Education | 1986- | Dergipark | Gratis | . |
| One Earth | 2019- excepto últimos 12 meses | Elsevier Science | Gratis | . |
| One Ecosystem | 2016- | Pensoft Publishers | Gratis | . |
| One Ecosystem | 2016- | ProQuest Information and Learning | . | . |
| One Health | 2015- | Elsevier Science | Gratis | . |
| One Health | 2015- | PubMed Central | Gratis | . |
| One Health & Implementation Research | 2020- | OAE Publishers | Gratis | . |
| One Health & Risk Management | 2020- | Asociatia de Biosiguranta si Biosecuritate | Gratis | . |
| One health advances | 2023- | BioMed Central | Gratis | . |
| One health advances | 2023- | Ebsco Academic | . | . |
| One Health Bulletin | 2021- | Ebsco Academic | . | . |
| One Health Bulletin | 2021- | MedKnow | Gratis | . |
| One Health Journal of Nepal | 2022- | Nepal Journals Online | Gratis | . |
| One Health Outlook | 2018- | BioMed Central | Gratis | . |
| One Health Outlook | 2019- | PubMed Central | Gratis | . |
| One Health Outlook | 2019- | ProQuest Information and Learning | . | . |
| One Health Outlook | 2019- | Springer | . | . |
| One hundred fifth annual report of the New York State Museum and Science service | 1943-1943 | BioDiversity Heritage Library | Gratis | . |
| One hundred first annual report of the New York State Museum : Charles C. Adams, director | 1939-1939 | BioDiversity Heritage Library | Gratis | . |
| One hundred fourth annual report of the New York State Museum and Science service | 1942-1942 | BioDiversity Heritage Library | Gratis | . |
| One hundred nineteenth annual report of the New York State Museum and Science service | 1958-1958 | BioDiversity Heritage Library | Gratis | . |
| One hundred second annual report of the New York State Museum : Charles C. Adams, director | 1940-1940 | BioDiversity Heritage Library | Gratis | . |
| One hundred seventh annual report of the New York State Museum | 1944-1944 | BioDiversity Heritage Library | Gratis | . |
| One hundred sixth annual report of the New York State Museum and Science service | 1944-1944 | BioDiversity Heritage Library | Gratis | . |
| One hundred third annual report of the New York State Museum : Charles C. Adams, director | 1941-1941 | BioDiversity Heritage Library | Gratis | . |
| One hundred twentieth annual report of the New York State Museum and Science service | 1959-1959 | BioDiversity Heritage Library | Gratis | . |
| One hundred twenty-fifth annual report of the New York State Museum and Science Service | 1964-1964 | BioDiversity Heritage Library | Gratis | . |
| One hundred twenty-first annual report of the New York State Museum and Science service | 1960-1960 | BioDiversity Heritage Library | Gratis | . |
| One hundred twenty-fourth annual report of the New York State Museum and Science Service | 1963-1963 | BioDiversity Heritage Library | Gratis | . |
| One hundred twenty-second annual report of the New York State Museum and Science Service | 1961-1961 | BioDiversity Heritage Library | Gratis | . |
| One hundred twenty-third annual report of the New York State Museum and Science Service | 1962-1962 | BioDiversity Heritage Library | Gratis | . |
| One in Christ | 2008- | Ebsco Academic | . | . |
| One Nation With Brian Kilmeade | 2023- | ProQuest Information and Learning | . | . |
| One Person Library | 2006-2009 | Ebsco Academic | . | . |
| One to One | 1998-2000 | ProQuest Information and Learning | . | . |
| One World Archaeology | 2011- | Springer Series | . | . |
| Onearth | 2001- | National Resources Defense Council | Gratis | . |
| Onearth | 1994-2006 | ProQuest Information and Learning | . | . |
| Onearth | 2014-2020 | Ebsco Academic | . | . |
| OnFilm | 2003-2013 | ProQuest Information and Learning | . | . |
| ONGAKUGAKU Journal of the Musicological Society of Japan | 2011-2022 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Onion trials | 1991-1991 | BioDiversity Heritage Library | Gratis | . |
| Onion World | 2010- | Ebsco Academic | . | . |
| Onkogematologiâ | 2011- | elpub.ru | Gratis | . |
| Onkologe Der | 1996- | Springer | . | . |
| Onkologia w praktyce klinicznej | 2005-2014 | Via Medica | Gratis | Cambio a: Oncology in Clinical Practice |
| Onkologija | 2008- | Institute of Oncology Ljubljana | Gratis | . |
| Onkourologiâ | 2009- | . | Gratis | . |
| Online | 1994-2012 | Ebsco Academic | . | . |
| Online | 1988-2012 | ProQuest Information and Learning | . | . |
| Online and CD-Rom Review | 1999 | Emerald | . | Cambio a: Online Information Review |
| Online Brazilian Journal of Nursing | 2005- | Fluminense Federal University | Gratis | . |
| Online Brazilian Journal of Nursing | 2007- | Ebsco Academic | . | . |
| Online Brazilian Journal of Nursing | 2005-2020 | ProQuest Information and Learning | . | . |
| Online Brazilian Journal of Nursing | 2002- | Universidade Federal Fluminense | Gratis | . |
| Online Classroom | 2004-2006 | Ebsco Academic | . | . |
| Online Heidelberg journal of religions on the internet | 2005- | Universitatsbibliothek Heidelberg | Gratis | . |
| Online Information Review | 1999- | Emerald | . | . |
| Online Information Review | 1998- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Online International Interdisciplinary Research Journal | 2011- | Online International Interdisciplinary Research Journal | Gratis | . |
| Online International Interdisciplinary Research Journal | 2011- | Online International Interdisciplinary Research Journal | Gratis | . |
| Online journal for global engineering in education | 2006- | University of Rhode Island | Gratis | . |
| Online journal for workforce education and development | 2005- | Southern Illinois University | Gratis | . |
| Online Journal of Analytic Combinatorics | 2006- | University of Missouri | Gratis | . |
| Online Journal of Animal and Feed Research | 2011- | Science-Line Publication | Gratis | . |
| Online Journal of Animal and Feed Research | 2023- | Ebsco Academic | . | . |
| Online Journal of Applied Knowledge Management | 2013- | The International Institute for Applied Knowledge Management | Gratis | . |
| Online Journal of Applied Knowledge Management | 2014- | Ebsco Academic | . | . |
| Online journal of art and design | 2013- | Eastern Mediterranean University | Gratis | . |
| Online journal of art and design | 2013- | Ebsco Academic | . | . |
| Online journal of bass research | 2003- | International Society of Bassists | Gratis | . |
| OnLine Journal of Biological Sciences | 2006- | Science publications | Gratis | . |
| Online Journal of Communication & Media Technologies | 2011- | Online Journal of Communication and Media Technologies | Gratis | . |
| Online Journal of Counselling and Education | 2012- | TOJCE | Gratis | . |
| Online Journal of Distance Learning Administration | 1998- | State University of West Georgia | Gratis | . |
| Online Journal of Earth Sciences | 2007- | Medwell Online | Gratis | . |
| Online Journal of Ethics | 1995- | St. Thomas University, Cameron School of Business | Gratis | . |
| Online Journal of Health & Allied Sciences | 2002- | Editor: B. S. Kakkilaya | Gratis | . |
| Online Journal of Health Ethics | 2004- | University of Mississippi Medical Center | Gratis | . |
| Online Journal of Health Ethics | 2012- | Ebsco Academic | . | . |
| Online Journal of International Case Analysis | 2008-2014 | ProQuest Information and Learning | . | . |
| Online Journal of Issues in Nursing | 1996- | Kent State University School of Nursing | Gratis | . |
| Online Journal of Issues in Nursing | 2002- | Ebsco Academic | . | . |
| Online Journal of Issues in Nursing | 2004- | ProQuest Information and Learning | . | . |
| Online Journal of JSPEN | 2019- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Online Journal of Music Sciences | 2016- | Dergipark | Gratis | . |
| Online Journal of New Horizons in Education | 2011- | Online Journal of New Horizons in Education | Gratis | . |
| Online Journal of Nursing Informatics | 2006- | Ebsco Academic | . | . |
| Online Journal of Nursing Informatics | 1997- | OJNI Corp | Gratis | . |
| Online Journal of Nursing Informatics | 1997- | HIMSS | Gratis | . |
| Online Journal of Nursing Informatics | 2014- | ProQuest Information and Learning | . | . |
| Online Journal of Peace and Conflict Resolution | 1998-2007 | Tabula Rasa Institute | Gratis | . |
| Online Journal of Public Health Informatics | 2009- | University of Illinois at Chicago | Gratis | . |
| Online Journal of Public Health Informatics | 2009-2021 | PubMed Central | Gratis | . |
| Online Journal of Rural Nursing & Health Care | 2000- | Ebsco Academic | . | . |
| Online Journal of Rural Nursing & Health Care | 2000- | Binghamton University | Gratis | . |
| Online Journal of Rural Research & Policy | 2010- | Ebsco Academic | . | . |
| Online Journal of Rural Research & Policy | 2006- | New Prairie Press | Gratis | . |
| Online Journal of Rural Research & Policy | 2006- | New Prairie Press | Gratis | . |
| Online Journal of Science and Technology | 2011- | TOJSAT | Gratis | . |
| Online journal of social sciences research | 2012- | Online Research Journals | Gratis | . |
| Online Journal of Space Communication | 2002- | Ohio University | Gratis | . |
| Online Journal of Space Communication | 2012- | Ebsco Academic | . | . |
| Online journal on mathematics and statistics OJMS | 2010- | INFOMESR | Gratis | . |
| Online journalism review | 1998- | Online Journalism Review | Gratis | . |
| Online Learning | 2014- | Vanderbilt University | Gratis | Cambio de: Journal of asynchronous learning networks |
| Online Learning | 2014- | Online Learning Consortium | Gratis | . |
| Online Libraries & Microcomputers | 2001-2002 | Ebsco Academic | . | . |
| Online Libraries & Microcomputers | 1996-2002 | ProQuest Information and Learning | . | . |
| Online Newsletter | 1996-2002 | ProQuest Information and Learning | . | . |
| Online Planning Journal | 1996- | University College London | Gratis | . |
| Online Product News | 1997- | ProQuest Information and Learning | . | . |
| Online Searcher | 2013-2022 | Ebsco Academic | . | . |
| Online Searcher | 2013-2022 | ProQuest Information and Learning | . | . |
| Online Social Networks and Media | 2017- | Elsevier Science | . | . |
| Online Trombone Journal | 1996- | H. Human | Gratis | . |
| Online Turkish Journal of Health Sciences | 2016- | Dergipark | Gratis | . |
| Online Zeitschrift zur Antiken Numismatik OZeAN | 2019- | Westfälische Wilhelms-Universität Münster | Gratis | . |
| ONnature | 2003- | Ontario Nature | Gratis | Cambio de: Seasons |
| Ono ch'onggak changae yon'gu | 1996-2012 | Korean Academy of Speech-Language Pathology and Audiology | Gratis | Cambio a: Communication sciences & disorders. |
| Onoba Revista de arqueología y antigüedad | 2013- | Universidad de Huelva | Gratis | . |
| Onomasiology Online OnOn | 2000- | . | Gratis | . |
| Onomastica | 2012- | Polska Akademia Nauk | Gratis | . |
| Onomázein | 2007- | Dialnet | Gratis | . |
| Onomázein | 2000- | Red ALyC | Gratis | . |
| Onomázein | 1996- | . | Gratis | . |
| Onomstica desde Amrica Latina | 2020- | Universidade Estadual do Oeste do Paran | Gratis | . |
| ONS Connect | 2007-2016 | Ebsco Academic | . | . |
| ONS News | 2000-2006 | Ebsco Academic | . | . |
| ONS Nursing Scan in Oncology | 1998-1998 | ProQuest Information and Learning | . | . |
| ONS Voice | 2017- excepto últimos 12 meses | Ebsco Academic | . | . |
| ONS Voice | 2005-2022 | ProQuest Information and Learning | . | . |
| Onstage | 2000- | Primedia Business Magazines and Media | Gratis | . |
| Ontare | 2013- | Universidad Ean | Gratis | . |
| Ontario Accident Benefit Case Summaries | 1997-2002 | ProQuest Information and Learning | . | . |
| Ontario Action Researcher | 1998- | Nipissing University | Gratis | . |
| Ontario Archaeology | 2005- | Ebsco Academic | . | . |
| Ontario Birchbark | 2004-2006 | Ebsco Academic | . | . |
| Ontario Birchbark | 2002-2006 | ProQuest Information and Learning | . | . |
| Ontario Birds | 1983- | SORA | Gratis | . |
| Ontario Dairy Farmer | 2015- excepto últimos 1 dias | ProQuest Information and Learning | . | . |
| Ontario Dentist | 2006- excepto últimos 9 meses | Ebsco Academic | . | . |
| Ontario Farmer | 2007- excepto últimos 1 dias | ProQuest Information and Learning | . | . |
| Ontario Gazette | 2000- | Ontario Ministry of Consumer and Business Services (Canada) | Gratis | . |
| Ontario Health Technology Assessment Series | 2001- | PubMed Central | Gratis | . |
| Ontario History | 2005-2009 | ProQuest Information and Learning | . | . |
| Ontario Hog Farmer | 2015- excepto últimos 1 dias | ProQuest Information and Learning | . | . |
| Ontario Mennonite History | 2012- | Ebsco Academic | . | . |
| Ontario natural science bulletin | 1905-1913 | BioDiversity Heritage Library | Gratis | . |
| Ontario Pay and Employment Equity Guide | 1997-2001 | ProQuest Information and Learning | . | . |
| Ontario Real Estate Law Guide | 1997-2002 | ProQuest Information and Learning | . | . |
| Ontario Tax Reporter | 1996-2002 | ProQuest Information and Learning | . | . |
| OnTheInternet | 1996- | Internet Society | Gratis | . |
| Ontology Studies | 2008- | RACO | Gratis | . |
| Ontosemiótica | 2014- | Universidad de Los Andes (Venezuela) | Gratis | . |
| Onychium Boletin del Grupo Entomologico Toscano | 2004- | Gruppo Entomologico Toscano. | Gratis | . |
| On_Culture | 2016- | WordPress | Gratis | . |
| ood Processing: Techniques & Technology / Tehnika i Tehnologiâ Pisevyh Proizvodstv | 2009-2018 | ProQuest Information and Learning | . | . |
| OOHNA Journal | 2011- | Ebsco Academic | . | . |
| OOHNA Journal | 2014-2020 | ProQuest Information and Learning | . | . |
| Oologist's advertiser | 1890-1890 | BioDiversity Heritage Library | Gratis | . |
| Oologist's exchange | 1888-1890 | BioDiversity Heritage Library | Gratis | . |
| Oologist's record | 1921-1923 | BioDiversity Heritage Library | Gratis | . |
| OORJA International Journal of Management & IT | 2017- | Ebsco Academic | . | . |
| Op Cit Revista del Centro de Investigaciones Historicas | 1988- | Universidad de Puerto Rico | Gratis | . |
| OPAL Online publizierte Arbeiten zur Linguistik | 2005- | Institut für Deutsche Sprache | Gratis | . |
| Opción | 2003-2009 | SciELO (Venezuela) | Gratis | . |
| Opción | 2001- | Red ALyC | Gratis | . |
| Opción | 1999- | Dialnet | Gratis | . |
| Opción | 1984- | Universidad del Zulia | Gratis | . |
| Opción México | 2002- | Instituto Tecnologico Autonoma de Mexico | Gratis | . |
| OPEC Annual Report Organization of Petroleum Exporting Countries | 1998- | OPEC : Organization of Petroleum Exporting Countries | Gratis | . |
| OPEC Annual Statistical Bulletin Organization of Petroleum Exporting | 1999- | OPEC : Organization of Petroleum Exporting Countries | Gratis | . |
| OPEC Bulletin Organization of Petroleum Exporting Countries | 2001- | OPEC : Organization of Petroleum Exporting Countries | Gratis | . |
| OPEC Energy Review | 2008- | Wiley Online Library | . | Cambio de: OPEC Review |
| OPEC Energy Review | 2008- excepto últimos 12 meses | Ebsco Academic | . | Cambio de: OPEC Review |
| OPEC Review Energy Economics & Related Issues | 1997-2006 | Wiley Online Library | . | Cambio a: OPEC Energy Review |
| OPEC Review Energy Economics & Related Issues | 1999-2007 | Ebsco Academic | . | Cambio a: OPEC Energy Review |
| Open Access Animal Physiology | 2010-2016 | Dove Medical Press | Gratis | . |
| Open Access Animal Physiology | 2009-2016 | ProQuest Information and Learning | . | . |
| Open Access Bioinformatics | 2010-2016 | Dove Medical Press | Gratis | . |
| Open Access Bioinformatics | 2009-2016 | ProQuest Information and Learning | . | . |
| Open Access Emergency Medicine | 2010- | Dove Medical Press | Gratis | . |
| Open Access Emergency Medicine | 2009- | PubMed Central | Gratis | . |
| Open Access Emergency Medicine | 2009- | ProQuest Information and Learning | . | . |
| Open Access Emergency Medicine | 2013- | Taylor & Francis | Gratis | . |
| Open Access Insect Physiology | 2009-2016 | Dove Medical Press | Gratis | . |
| Open Access Insect Physiology | 2009-2016 | ProQuest Information and Learning | . | . |
| Open Access Journal of Clinical Trials | 2009- | Dove Medical Press | Gratis | . |
| Open Access Journal of Clinical Trials | 2009- | ProQuest Information and Learning | . | . |
| Open Access Journal of Clinical Trials | 2009- | Taylor & Francis | Gratis | . |
| Open Access Journal of Contraception | 2010- | Dove Medical Press | Gratis | . |
| Open Access Journal of Contraception | 2015- | PubMed Central | Gratis | . |
| Open Access Journal of Contraception | 2010- | ProQuest Information and Learning | . | . |
| Open Access Journal of Contraception | 2010- | Taylor & Francis | Gratis | . |
| Open access journal of forensic psychology | 2009- | Open access journal of forensic psychology | Gratis | . |
| Open Access Journal of Medicinal and Aromatic Plants | 2010- | ICAR | Gratis | . |
| Open Access Journal of Medicinal and Aromatic Plants | 2010-2018 | ProQuest Information and Learning | . | . |
| Open Access Journal of Science and Technology | 2013- | AgiAl Publishing House | Gratis | . |
| Open Access Journal of Science and Technology | 2013- | ProQuest Information and Learning | . | . |
| Open Access Journal of Sports Medicine | 2010- | Dove Medical Press | Gratis | . |
| Open Access Journal of Sports Medicine | 2010- | PubMed Central | Gratis | . |
| Open Access Journal of Sports Medicine | 2010- | ProQuest Information and Learning | . | . |
| Open Access Journal of Sports Medicine | 2010 | Taylor & Francis | Gratis | . |
| Open Access Journal of Urology | 2009-2012 | Dove Medical Press | Gratis | Cambio a: Research and reports in urology |
| Open Access Journal of Urology | 2009-2012 | PubMed Central | Gratis | Cambio a: Research and reports in urology |
| Open Access Macedonian Journal of Medical Sciences | 2013- | ID Design Press | Gratis | Cambio de: Macedonian Journal of Medical Sciences |
| Open Access Macedonian Journal of Medical Sciences | 2015-2019 | PubMed Central | Gratis | Cambio de: Macedonian Journal of Medical Sciences |
| Open Access Medical Statistics | 2011-2018 | Dove Medical Press | Gratis | . |
| Open Access Medical Statistics | 2011-2018 | ProQuest Information and Learning | . | . |
| Open Access Organization & Management Review | 2023- | Ebsco Academic | . | . |
| Open Access Rheumatology Research and Reviews | 2009- | Dove Medical Press | Gratis | . |
| Open Access Rheumatology Research and Reviews | 2009- | PubMed Central | Gratis | . |
| Open Access Rheumatology Research and Reviews | 2009- | ProQuest Information and Learning | . | . |
| Open Access Rheumatology Research and Reviews | 2009- | Taylor & Francis | Gratis | . |
| Open Access Surgery | 2008- | Dove Medical Press | Gratis | . |
| Open Access Surgery | 2008- | ProQuest Information and Learning | . | . |
| Open Access Surgery | 2008- | Taylor & Francis | Gratis | . |
| Open Acoustics Journal | 2008-2014 | Bentham open | Gratis | . |
| Open Addiction Journal | 2008-2014 | Bentham open | Gratis | . |
| Open Aerospace Engineering Journal | 2008-2013 | Bentham open | Gratis | . |
| Open Aging Journal | 2007-2008 | Bentham open | Gratis | Cambio a: Open Longevity Science |
| Open Agriculture | 2016- | de Gruyter | Gratis | . |
| Open Agriculture Journal | 2007- | Bentham open | Gratis | . |
| Open AIDS Journal | 2007- | Bentham open | Gratis | . |
| Open AIDS Journal | 2007-2018 | PubMed Central | Gratis | . |
| Open AIDS Journal | 2012- | ProQuest Information and Learning | . | . |
| Open Allergy Journal | 2008-2015 | Bentham open | Gratis | . |
| Open Analytical Chemistry Journal | 2007-2015 | Bentham open | Gratis | . |
