| Titulo | Fecha | Proveedor | Acceso | Cambio de titulo |
| Obesity Medicine | 2016- | Clinical Key | . | . |
| Obesity Medicine | 2016- | Elsevier Science | . | . |
| Obesity Pillars | 2022- | Elsevier Science | Gratis | . |
| Obesity Pillars | 2022- | PubMed Central | Gratis | . |
| Obesity research | 1993-2005 | Wiley Online Library | Gratis | Cambio a: Obesity |
| Obesity Research & Clinical Practice | 2007- | Elsevier Science | . | . |
| Obesity Research & Clinical Practice | 2007- | Clinical Key | . | . |
| Obesity Reviews | 2000- | Wiley Online Library | . | . |
| Obesity Science & Practice | 2015- | Wiley Online Library | Gratis | . |
| Obesity Science & Practice | 2015- | PubMed Central | Gratis | . |
| Obesity Science & Practice | 2015- | ProQuest Information and Learning | . | . |
| Obesity Surgery | 1991- | Springer | . | . |
| Obesity Surgery | 1997- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| OBG Management | 2000- | Dowden Health Media | Gratis | . |
| OBIHIRO OTANI JUNIOR COLLEGE Center for Regional collaboration | 2016- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Obiter | 2020- | SciELO (South Africa) | Gratis | . |
| Obituary Notices of Fellows of the Royal Society | 1932-1954 | JSTOR | . | Cambio a: Biographical Memoirs of Fellows of the Royal Society |
| Obituary Notices of Fellows of the Royal Society | 1932-1954 | Royal Society | . | Cambio a: Biographical Memoirs of Fellows of the Royal Society |
| Objectifs du Millénaire pour le développement | 2010- | UN iLibrary | . | . |
| Objective Standard | 2009- | ProQuest Information and Learning | . | . |
| Objector | 1998-2006 | ProQuest Information and Learning | . | . |
| OBM Genetics | 2017- | LIDSEN Publishing Inc. | Gratis | . |
| OBM Geriatrics | 2017- | LIDSEN Publishing Inc. | Gratis | . |
| OBM Hepatology and Gastroenterology | 2017- | LIDSEN Publishing Inc. | Gratis | . |
| OBM Integrative and Complementary Medicine | 2016- | LIDSEN Publishing Inc | Gratis | . |
| OBM Neurobiology | 2017- | LIDSEN Publishing Inc. | Gratis | . |
| OBM Transplantation | 2017- | LIDSEN Publishing Inc. | Gratis | . |
| OBOE | 2020- | OBOE On Biennials and Other Exhibitions Associazione Culturale | Gratis | . |
| Obozrenie Psihiatrii i Medicinskoj Psihologii imeni VM Behtereva | 2016- | Federal State Budget Scientific Institution National Medical Research Center for Psychiatry and Neurology n.a. V.M. Bekhterev Ministry of Health of the Russian Federation | Gratis | . |
| Obra digital: revista de comunicación | 2011- | RACO | Gratis | . |
| Obra digital: revista de comunicación | 2011- | Universitat de Vic | Gratis | . |
| Obradoiro de Historia Moderna | 2010- | Ebsco Academic | . | . |
| Obrana a Strategie | 2001- | University of Defence | Gratis | . |
| Obrana a Strategie | 2001- | ProQuest Information and Learning | . | . |
| Obrana a Strategie | 2007- | CEEOL | Gratis | . |
| Obras | 1999- | Expansion | Gratis | . |
| Obras malacologicas | 1890-1907 | BioDiversity Heritage Library | Gratis | . |
| Obras y Proyectos | 2011- | SciELO (Chile) | Gratis | . |
| Obras y Proyectos | 2013- | Ebsco Academic | . | . |
| Obrazovanie i Nauka | 2012- | . | Gratis | . |
| Obrazovanie i Samorazvitie | 2006- | Wayback Machine | Gratis | . |
| Obrero El órgano de la Agrupación Socialista Ferrolana y defensor de la clase trabajadora | 1932-1936 | Galiciana | Gratis | . |
| Observar | 2007- | RACO | Gratis | . |
| Observational Studies | 2005- | Project Muse | Gratis | . |
| Observationes Botanicae in Horto Dickensi Notatae | 1820-1822 | DIGI Zeitschriften | Gratis | . |
| Observations astronomiques faites à l'Observatoire impérial de Paris | 1803-1846 | Gallica. Bibliothèque Nationale Paris | Gratis | . |
| Observations faites sur les cours d'eau et les pluies centralisées pendant l'année Service hydrométrique du bassin de la Seine | 1872-1874 | Gallica. Bibliothèque Nationale Paris | Gratis | . |
| Observations magnétiques magnetic results | 1996- | Bureau Central de Magnétisme Terrestre | Gratis | . |
| Observations périodiques sur la physique l'histoire naturelle et les arts ou Journal des sciences et arts | 1756-1757 | Gallica. Bibliothèque Nationale Paris | Gratis | . |
| Observations sur l'histoire naturelle sur la physique et sur la peinture | 1752-1755 | BioDiversity Heritage Library | Gratis | . |
| Observations sur l'histoire naturelle, sur la physique et sur la peinture | 1752-1755 | BioDiversity Heritage Library | Gratis | . |
| Observations sur la physique sur l'histoire naturelle et sur les arts | 1773-1793 | Gallica. Bibliothèque Nationale Paris | Gratis | . |
| Observatoire de la société britannique | 2006- excepto últimos 12 meses | Open Edition | Gratis | . |
| Observatoire des Produits Bancaires | 2014-2017 | Ebsco Academic | . | . |
| Observatoire des Produits d'Assurance OPA | 2014-2014 | Ebsco Academic | . | . |
| Observatorio da imprensa | . | Projor | Gratis | . |
| Observatório da Jurisdição Constitucional | 2008- | Instituto Brasiliense de Direito Público | Gratis | . |
| Observatório da Religião | 2014-2017 | Universidade do Estado do Pará | Gratis | . |
| Observatorio de la Economia y la Sociedad China | 2007-2011 | El Grupo de Investigacion Eumed.net | Gratis | . |
| Observatorio Iberoamericano de la Economía y la Sociedad del Japón | 2009- | Universidad de Málaga | Gratis | . |
| Observatorio Iberoamericano del Desarrollo Local y la Economia Social | 2007- | El Grupo de Investigacion Eumed.net | Gratis | . |
| Observatorio Laboral Revista Venezolana | 2008- | Universidad de Carabobo | Gratis | . |
| Observatorio Laboral Revista Venezolana | 2008- | Dialnet | Gratis | . |
| Observatorio Laboral Revista Venezolana | 2008-2015 | Red ALyC | Gratis | . |
| Observatorio Medioambiental | 1998- excepto últimos 12 meses | Universidad Complutense de Madrid | Gratis | . |
| Observatorio Medioambiental | 2005- | ProQuest Information and Learning | . | . |
| Observatorio OBS* | 2007- | OberCom - Observatorio da Comunicação | Gratis | . |
| Observatorio OBS* | 2011-2011 | SciELO (Portugal) | Gratis | . |
| Observatorio OBS* | 2010- | Ebsco Academic | . | . |
| Observatorio Social de América Latina OSAL | 2000-2008 | CLACSO - Consejo Latinoamericano de Ciencias Sociales | Gratis | . |
| Observatorium Revista Electronica de Geografia | 2009- | Universidade Federal de Uberlândia | Gratis | . |
| Observatory | 1877- | NASA Astrophysics Data System | Gratis | . |
| Observer | 1999- excepto últimos 1 dias | ProQuest Information and Learning | . | . |
| Observer and record of agriculture Science and art | 1838-1839 | BioDiversity Heritage Library | Gratis | . |
| Observer London England | 1998- | Guardian Newspapers Limited | Gratis | . |
| Observer London England | 1995- | ProQuest Information and Learning | . | . |
| Obsidian | 2006- | Ebsco Academic | . | . |
| Obsidian | 1997-2022 | ProQuest Information and Learning | . | . |
| Obsidian III | 2002-2005 | Ebsco Academic | . | . |
| Obsidiana Ciencia y Cultura por Mexico | . | Editorial Emergente | Gratis | . |
| Obstetric Anesthesia Digest | 2015- | Ovid Technologies, Inc. | . | . |
| Obstetric Medicine | 2009-2015 | Ebsco Academic | . | . |
| Obstetric Medicine | 2008- excepto últimos 12 meses | PubMed Central | Gratis | . |
| Obstetrica si Ginecologie | 2017- | Ebsco Academic | . | . |
| Obstetrical & Gynecological Survey | 2001- | Ovid Technologies, Inc. | . | . |
| Obstetrician & Gynaecologist | 1999- excepto últimos 24 meses | Wiley Online Library | Gratis | . |
| Obstetrician & Gynaecologist | 2011- excepto últimos 12 meses | Ebsco Academic | . | . |
| Obstetrician & Gynaecologist | 1999- | Wiley Online Library | . | . |
| Obstetrics & Gynaecology Forum | 2010- | Ebsco Academic | . | . |
| Obstetrics & Gynecology | 1996-2003 | Elsevier Science | . | . |
| Obstetrics & Gynecology | 2011- | Ovid Technologies, Inc. | . | . |
| Obstetrics & Gynecology Science | 2013- | PubMed Central | Gratis | Cambio de: Korean Journal of Obstetrics & Gynecology |
| Obstetrics & Gynecology Science | 2013- | KoreaMed | Gratis | Cambio de: Korean Journal of Obstetrics & Gynecology |
| Obstetrics and Gynecology Clinics of North America | 1996- | Elsevier Science | . | . |
| Obstetrics and Gynecology Clinics of North America | 2007- | Clinical Key | . | . |
| Obstetrics and Gynecology International | 2009- | Hindawi Publishing Corporation | Gratis | . |
| Obstetrics and Gynecology International | 2009- | Ebsco Academic | . | . |
| Obstetrics and Gynecology International | 2009- | PubMed Central | Gratis | . |
| Obstetrics Gynaecology & Reproductive Medicine | 2007- | Elsevier Science | . | Cambio de: Current Obstetrics & Gynaecology |
| Obstetrics Gynaecology & Reproductive Medicine | 2007- | Clinical Key | . | Cambio de: Current Obstetrics & Gynaecology |
| Obstetrics, Gynecology and Reproduction | 2007- | Elpub.ru | Gratis | . |
| Obuda University e Bulletin | 2015-2019 | ProQuest Information and Learning | . | . |
| Obutchénie | 2017- | Universidade Federal de Uberlândia | Gratis | . |
| Obzornik zdravstvene nege | 2014- | Nurses and Midwives Association of Slovenia | Gratis | . |
| Obzornik zdravstvene nege | 2013- | ProQuest Information and Learning | . | . |
| OC Metro Business | 1994-2008 | ProQuest Information and Learning | . | . |
| Ocala Star Banner | 2004-2016 | ProQuest Information and Learning | . | . |
| Occasion Interdisciplinary Studies in the Humanities | 2009- | Stanford University | Gratis | . |
| Occasional paper (San Diego Society of Natural History) | 1968-1986 | BioDiversity Heritage Library | Gratis | . |
| Occasional Paper Canadian Wildlife Service | 1995- | Environment Canada | Gratis | . |
| Occasional Paper Garden History Society | 1969-1970 | JSTOR | . | . |
| Occasional paper Royal College of General Practitioners | 1990-2012 | PubMed Central | Gratis | Cambio de: Journal of the Royal College of General Practitioners. Occasional paper |
| Occasional Paper Series | 2015- | Bank Street College of Education | Gratis | . |
| Occasional Paper Series Institute of Public Finance | 1997- | Institute of Public Finance (Croatia) | Gratis | . |
| Occasional Paper Series Institute of Public Finance | 2005-2006 | ProQuest Information and Learning | . | . |
| Occasional papers - San Diego Society of Natural History | 1936-1986 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers - San Diego Society of Natural History | 1936-1954 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers / Tulane University, Museum of Natural History | 1977-1994 | BioDiversity Heritage Library | Gratis | . |
| Occasional Papers in Sociology and Anthropology | 1987- | Nepal Journals Online | Gratis | . |
| Occasional Papers Kagoshima University Research Center for the Pacific Islands | 2021- | Ebsco Academic | . | . |
| Occasional papers of Bernice P. Bishop Museum | 1898-1922 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the Boston Society of Natural History | 1880-1925 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the California Academy of Sciences | 1890-2013 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the Farlow Herbarium of Cryptogamic Botany | 1969-1987 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the Farlow Herbarium of Cryptogamic Botany | 1969-1987 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the Museum of Natural History, the University of Kansas | 1994-1996 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the Museum of Natural History, the University of Kansas | 1971-1994 | BioDiversity Heritage Library | Gratis | . |
| Occasional Papers of the Museum of Zoology Louisiana State University | 1938-1994 | SORA | Gratis | . |
| Occasional papers of the Museum of Zoology, University of Michigan | 1913-1924 | BioDiversity Heritage Library | Gratis | . |
| Occasional papers of the San Diego Society of Natural History | 1959-1964 | BioDiversity Heritage Library | Gratis | . |
| Occasional Papers on Mollusks. Museum of Comparative Zoology. Harvard University | 1945-1998 | BioDiversity Heritage Library | Gratis | . |
| Occasional Writer | 1726-1727 | Gale MOMW | . | . |
| Occhialì: Rivista sul Mediterraneo Islamico | 2017- | University of Calabria | Gratis | . |
| Occupational and Environmental Medicine | 1944-2007 | BMJ Publishing Group | Gratis | Cambio de: British journal of industrial medicine |
| Occupational and Environmental Medicine | 2001-2009 | Ovid Technologies, Inc. | . | Cambio de: British journal of industrial medicine |
| Occupational and Environmental Medicine | 1994-2007 | PubMed Central | Gratis | Cambio de: British journal of industrial medicine |
| Occupational and Environmental Medicine | 1994- excepto últimos 36 meses | JSTOR | . | Cambio de: British journal of industrial medicine |
| Occupational and Environmental Medicine | 1994- | BMJ Publishing Group | . | Cambio de: British journal of industrial medicine |
| Occupational and Environmental Medicine | 1994- excepto últimos 6 meses | ProQuest Information and Learning | . | Cambio de: British journal of industrial medicine |
| Occupational Hazards | 1996- | Penton Media | Gratis | . |
| Occupational Hazards | 2000-2008 | Ebsco Academic | . | . |
| Occupational Hazards | 1987-2008 | ProQuest Information and Learning | . | . |
| Occupational Health & Emergency Rescue | 2023- | Ebsco Academic | . | . |
| Occupational Health & Safety | 1992-2006 | ProQuest Information and Learning | . | . |
| Occupational Health & Wellbeing | 2002-2021 | ProQuest Information and Learning | . | . |
| Occupational Health and Safety | 1999- | Stevens Publishing Corporation | Gratis | . |
| Occupational Health Journal | 2023- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Occupational Health Management | 2008-2011 | ProQuest Information and Learning | . | . |
| Occupational health nursing | 1969-1985 | Sage Journals | . | Cambio a: Workplace health & safety |
| Occupational Health Review | 2020- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Occupational Health Science | 2017- | Springer | . | . |
| Occupational Health Science | 2017- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Occupational Hygiene & Medikal Ekology | 2016-2016 | Ebsco Academic | . | . |
| Occupational Hygiene and Health Promotion | 2018- | Yektaweb co | Gratis | . |
| Occupational Medicine | 1996- | Oxford Academic | . | . |
| Occupational Medicine | 1996- excepto últimos 12 meses | Oxford Academic | Gratis | . |
| Occupational Medicine | 2008- excepto últimos 12 meses | PubMed Central | Gratis
Artículos selectos | . |
| Occupational Medicine | 1996- excepto últimos 12 meses | Ebsco Academic | . | . |
| Occupational Medicine Pracovn¡ L¬karstv¡ | 2011- | Ebsco Academic | . | . |
| Occupational Outlook Handbook | 2003- | U.S. Department of Labor, Bureau of Labor Statistics | Gratis | . |
| Occupational Outlook Handbook | 2006-2012 | Ebsco Academic | . | . |
| Occupational Outlook Handbook | 1998-2010 | ProQuest Information and Learning | . | . |
| Occupational Outlook Handbook (Online) | 2019-2018 | ProQuest Information and Learning | . | . |
| Occupational Outlook Quarterly | 1999- | U.S. Department of Labor, Bureau of Labor Statistics | Gratis | Cambio a: Career Outlook |
| Occupational Outlook Quarterly | 1990-2014 | Ebsco Academic | . | Cambio a: Career Outlook |
| Occupational Outlook Quarterly | 1987-2014 | ProQuest Information and Learning | . | Cambio a: Career Outlook |
| Occupational Psychology | 1965-1973 | Ebsco Academic | . | . |
| Occupational Psychology Outlook | 2023- | Ebsco Academic | . | . |
| Occupational Therapy in Health Care | 1997- | Taylor & Francis | . | . |
| Occupational Therapy in Mental Health | 1997- | Taylor & Francis | . | . |
| Occupational Therapy International | 2000- | Ebsco Academic | . | . |
| Occupational Therapy International | 1996-2016 | Wiley Online Library | . | . |
| Occupational Therapy International | 2017- | PubMed Central | Gratis | . |
| Occupational Therapy International | 2017- | Hindawi Publishing Corporation | Gratis | . |
| Occupational Therapy International | 1998- | ProQuest Information and Learning | . | . |
| Occupational Therapy Now | 2007- | ProQuest Information and Learning | . | . |
| Occupational Wages & Hours of Work & Retail Food Prices | 2007-2009 | Ebsco Academic | . | . |
| Occupational Wages & Hours of Work & Retail Food Prices | 2009-2009 | ProQuest Information and Learning | . | . |
| Occursus - Revista de Filosofia | 2016- | Universidade Estadual do Ceará | Gratis | . |
| Ocean & Coastal Law Journal | 2011- | Ebsco Academic | . | . |
| Ocean & Coastal Law Journal | 2011- | University of Maine | Gratis | . |
| Ocean & Coastal Management | 1992- | Elsevier Science | . | Cambio de: Ocean and Shoreline Management |
| Ocean & polar research | 1999- | Korea Science | Gratis | . |
| Ocean & polar research | 1979- | Korea Ocean Research and Development Institute | Gratis | . |
| Ocean & polar research | 2012- | Ebsco Academic | . | . |
| Ocean Acidification | 2012-2012 | Portico | Gratis | . |
| Ocean and Coastal Research | 2020- | SciELO (Brasil) | Gratis | . |
| Ocean and Shoreline Management | 1988-1991 | Elsevier Science | . | Cambio de: Ocean Management;
Cambio a: Ocean & Coastal Management |
| Ocean and Society | 2025- | Cogitatiopress | Gratis | . |
| Ocean County Observer | 2002-2008 | ProQuest Information and Learning | . | . |
| Ocean Development & International Law | 1996- excepto últimos 12 meses | Ebsco Academic | . | . |
| Ocean Development & International Law | 1997- | Taylor & Francis | . | . |
| Ocean Dynamics | 2000- | Springer | . | Cambio de: Deutsche hydrographische Zeitschrift |
| Ocean Dynamics | 2003- excepto últimos 12 meses | Ebsco Academic | . | Cambio de: Deutsche hydrographische Zeitschrift |
| Ocean Dynamics | 2002-2019 | ProQuest Information and Learning | . | Cambio de: Deutsche hydrographische Zeitschrift |
| Ocean Ecosystems | 2025- | BioMed Central | Gratis | . |
| Ocean Engineering | 1970- | Elsevier Science | . | . |
| Ocean Engineering & Oceanography | 2013- | Springer Series | . | . |
| Ocean Management | 1973-1986 | Elsevier Science | . | Cambio a: Ocean and Shoreline Management |
| Ocean Modelling | 1999- | Elsevier Science | . | . |
| Ocean News & Technology | 1998- | ProQuest Information and Learning | . | . |
| Ocean Science | 2005- | Copernicus Publications | Gratis | . |
| Ocean Science | 2005- | Ebsco Academic | . | . |
| Ocean Science | 2010- | ProQuest Information and Learning | . | . |
| Ocean Science Discussions | 2004- | Copernicus Publications | Gratis | . |
| Ocean Science Discussions | 2005-2015 | Ebsco Academic | . | . |
| Ocean Science Journal | 2005- | Springer | . | . |
| Ocean State Business | 1986-1990 | ProQuest Information and Learning | . | . |
| Ocean Systems Engineering | 2011- | Techno Press | Gratis | . |
| Ocean Yearbook | 2015- excepto últimos 36 meses | Ebsco Academic | . | . |
| Ocean-Land-Atmosphere Research | 2022- | American Association for the Advancement of Science | Gratis | . |
| Oceania | 1930- excepto últimos 60 meses | JSTOR | . | . |
| Oceania | 1993- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oceania | 2007- | Wiley Online Library | . | . |
| Oceania | 1994-2014 | ProQuest Information and Learning | . | . |
| Oceania Newsletter | 1992- | Centre for Pacific and Asian Studies, University of Nijmegen | Gratis | . |
| Oceanic Linguistics | 2003- excepto últimos 12 meses | Ebsco Academic | . | . |
| Oceanic Linguistics | 1962- excepto últimos 36 meses | JSTOR | . | . |
| Oceanic Linguistics | 2001- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Oceanic Linguistics | 1999- | Project Muse | . | . |
| Oceanic Linguistics Special Publications | 1966- excepto últimos 36 meses | JSTOR | . | . |
| Oceanide | 2009- | Sociedad Española de Dietética y Ciencias de la Alimentación | Gratis | . |
| Oceanides | 2003- | IPN-CICMAR | Gratis | Cambio de: Investigaciones marinas CICIMAR |
| Oceanography | 1988- | The Oceanography Society (TOS) | Gratis | . |
| Oceanography | 2012- | Ebsco Academic | . | . |
| Oceanography in Japan | 1992- excepto últimos 6 meses | National Institute of Informatics Japan | Gratis | . |
| Oceanography in Japan | 1992- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Oceanography in Japan | 2015- | Ebsco Academic | . | . |
| Oceanologia | 1971- | Polska Akademia Nauk | Gratis | . |
| Oceanologia | 2012-2016 | Ebsco Academic | . | . |
| Oceanologia | 2011- | Elsevier Science | Gratis | . |
| Oceanologia | 2011- | Polska Akademia Nauk | Gratis | . |
| Oceanological & Hydrobiological Studies | 2011-2014 | Springer | . | . |
| Oceanological & Hydrobiological Studies | 2007- | Sciendo | . | . |
| Oceanological & Hydrobiological Studies | 2011- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| Oceanology | 2006- | Springer | . | . |
| Oceanology | 2006-2018 | ProQuest Information and Learning | . | . |
| Oceans | 1988-1989 | ProQuest Information and Learning | . | . |
| Oceans | 2019- | MDPI AG | Gratis | . |
| Oceans | 2021- | ProQuest Information and Learning | . | . |
| Oceans | 2021- | Ebsco Academic | . | . |
| Oceanus | 1996- | Woods Hole Oceanographic Institution | Gratis | . |
| Oceanus | 1952-2007 | BioDiversity Heritage Library | Gratis | . |
| Oceanus | 1996-2017 | ProQuest Information and Learning | . | . |
| OCHA Policy and Studies Series | 2013- | UN iLibrary | . | . |
| Ochrana Dikoj Prirody | 2001- | Centr Ochrany Dikoj Prirody | Gratis | . |
| Ochrona Dziedzictwa Kulturowego | 2016- | Lublin University of Technology | Gratis | . |
| Ochrona Srodowiska | 2013-2019 | Ebsco Academic | . | . |
| Ochrona Srodowiska | 2011-2019 | ProQuest Information and Learning | . | . |
| Ochrona Srodowiska i Zasob¦w Naturalnych | 2014- | Ebsco Academic | . | . |
| Ochrona Srodowiska i Zasobów Naturalnych | 2013- | Sciendo | Gratis | . |
| Ochsner Journal | 2000- | Allen Press | Gratis | . |
| Ochsner Journal | 1999- | PubMed Central | Gratis | . |
| Ochsner Journal | 2013- | Ebsco Academic | . | . |
| Ochsner Journal | 1999- excepto últimos 6 meses | ProQuest Information and Learning | . | . |
| OCL - Oilseeds and fats Crops and Lipids | 2013- | EDP Sciences | Gratis | Cambio de: Ol?agineux, Corps gras, Lipides |
| OCL - Oilseeds and fats Crops and Lipids | 2015- | Ebsco Academic | . | Cambio de: Ol?agineux, Corps gras, Lipides |
| OCL oléagineux corps gras lipides | 2000-2013 | EDP Sciences | Gratis | Cambio a: OCL |
| OCLC Abstracts | 1998-2020 | Online Computer Library Center | Gratis | . |
| OCLC Systems and Services | 1994-2015 | Emerald | . | Cambio a: Digital Library Perspectives |
| Ocnos Revista de estudios sobre lectura | 2005- | Universidad de Castilla-La Mancha | Gratis | . |
| Ocnos Revista de estudios sobre lectura | 2005- | Red ALyC | Gratis | . |
| Ocnos Revista de estudios sobre lectura | 2005- | Dialnet | Gratis | . |
| Ocnos Revista de estudios sobre lectura | 2010- | Ebsco Academic | . | . |
| Octa Journal of Biosciences | 2013- | Scientific Planet Society | Gratis | . |
| Octa Journal of Biosciences | 2013- | ProQuest Information and Learning | . | . |
| Octa Journal of Environmental Research | 2013- | Scientific Planet Society | Gratis | . |
| Octa Journal of Environmental Research | 2013- | ProQuest Information and Learning | . | . |
| Octahedron Drug Research | 2022- | Egyptian Journals | Gratis | . |
| Octane | 1996-1998 | ProQuest Information and Learning | . | . |
| Octane | 2014-2022 | ProQuest Information and Learning | . | . |
| Octane Week | 2006-2009 | Ebsco Academic | . | . |
| Octane Week | 1995-2009 | ProQuest Information and Learning | . | . |
| October | 1976- excepto últimos 60 meses | JSTOR | . | . |
| October | 1997- excepto últimos 12 meses | Ebsco Academic | . | . |
| October | 2001- | MIT Press | . | . |
| Octopus A Visual Studies Journal | 2011-2011 | Ebsco Academic | . | . |
| Ocula Occhio semiotico sui media | 2000- | Associazione Ocula | Gratis | . |
| Ocular Genetics and Omics | 2024- | Elsevier Science | Gratis | . |
| Ocular Immunology & Inflammation | 1997- excepto últimos 12 meses | Ebsco Academic | . | . |
| Ocular Immunology & Inflammation | 1997- | Taylor & Francis | . | . |
| Ocular Oncology and Pathology | 2015- | Karger Publishers | . | . |
| Ocular Oncology and Pathology | 2014- | PubMed Central | Gratis | . |
| Ocular Surface | 2003- | Elsevier Science | . | . |
| Ocular Surface | 2007- | Clinical Key | . | . |
| Ocular Surgery News | 2008- | Ebsco Academic | . | . |
| Ocular Surgery News | 2008- | ProQuest Information and Learning | . | . |
| Ocular Surgery News | 2009-2011 | ProQuest Information and Learning | . | . |
| Ocular Surgery News | 2012-2015 | ProQuest Information and Learning | . | . |
| Ocular Surgery News Asia Pacific | 2009-2010 | Ebsco Academic | . | . |
| Ocular Surgery News Europe | 2009-2010 | Ebsco Academic | . | . |
| Ocular Surgery News Europe | 2009-2022 | ProQuest Information and Learning | . | . |
| Ocular Surgery News Europe Asia Pacific Edition | 2008-2009 | Ebsco Academic | . | . |
| Ocular Surgery News Europe Asia Pacific Edition | 2008-2009 | ProQuest Information and Learning | . | . |
| Ocular Surgery News Latin American Edition | 2004- | Healio | Gratis | . |
| Ocular Surgery News Latin American Edition | 2008-2010 | Ebsco Academic | . | . |
| Oculum Ensaios | 2000- | PUC-Campinas | Gratis | . |
| Oculum Ensaios | 2005- | Red ALyC | Gratis | . |
| Oculum Ensaios | 2015- | Pontifícia Universidade Católica de Campinas | Gratis | . |
| OD Practitioner | 2009-2018 | Ebsco Academic | . | . |
| Odd Fellows' Magazine | 1843-1845 | Australian Cooperative Digitisation Project | Gratis | . |
| Odd Fellows' Magazine | 1828-1895 | Gale MOMW | . | . |
| Odd Fellows' Quarterly Magazine | 1928-1895 | Gale MOMW | . | . |
| Odd-Fellows' Chronicle | 1844-1848 | Gale MOMW | . | . |
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| 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 Cardinal | 1978-2016 | SORA | Gratis | . |
| Ohio Cardinal | 1978- excepto últimos 12 meses | Ohio Ornithological Society | 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 Public Health | 2018- | Ohio State University Libraries | 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 State online music journal OSOM | 2008-2009 | Wayback Machine | 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- | 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 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 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 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 | . | . |
| 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 | . |
