| Titulo | Fecha | Proveedor | Acceso | Cambio de titulo |
| Orbita Mathematicae | 2024- | Mathematical Sciences Publishers | . | . |
| Orbital The Electronic Journal of Chemistry | 2009- | Universidade Federal de Mato Grosso do Sul | Gratis | . |
| Orbital The Electronic Journal of Chemistry | 2010- | Ebsco Academic | . | . |
| Orbith: Majalah Ilmiah Pengembangan Rekayasa dan Sosial | 2014- | Politeknik Negeri Semarang | Gratis | . |
| Orchadian The | 1963-2015 | BioDiversity Heritage Library | Gratis | . |
| Orchard and farm | 1922-1924 | BioDiversity Heritage Library | Gratis | . |
| Orchard and garden | 1889-1891 | BioDiversity Heritage Library | Gratis | . |
| Orchardist | 2004- | Ebsco Academic | . | . |
| Orchid Academia Siraha | 2022- | Nepal Journals Online | Gratis | . |
| Orchid album : | 1882-1897 | BioDiversity Heritage Library | Gratis | . |
| Orchid Research Newsletter | 1998- | Royal Botanical Gardens, Kew | Gratis | . |
| Orchid review | 1893-1923 | BioDiversity Heritage Library | Gratis | . |
| Orchid Science and Biotechnology | 2007-2007 | Global Science Books | Gratis | . |
| Orchid world. A monthly illustrated journal entirely devoted to orchidology | 1910-1916 | BioDiversity Heritage Library | Gratis | . |
| Orchideenzauber | 2021- | Ebsco Academic | . | . |
| Orchidophile; journal des amateurs d'orchideés | 1881-1892 | BioDiversity Heritage Library | Gratis | . |
| Orchis Monatsschrift der Deutschen Gesellschaft für Orchideenkunde | 1906-1920 | Botanicus | Gratis | . |
| Orchis Monatsschrift der Deutschen Gesellschaft für Orchideenkunde | 1906-1920 | BioDiversity Heritage Library | Gratis | . |
| Orð og Tunga | 2015- | Árni Magnússon Institute for Icelandic Studies | Gratis | . |
| Ordenanzas municipales para la ciudad de Monforte y su término municipal | 1897 | Galiciana | Gratis | . |
| Ordentliche wochentliche Kayserl Reichs Ober Post Amts Zeitung In Franckfurt am Mayn | 1750-1750 | Gottinger Digitalisierungs-Zentrum | Gratis | . |
| Order | 1984- | Springer | . | . |
| Ordia Prima | 2002-2014 | Ebsco Academic | . | . |
| Ordit L' l'anuari del CREM | 2007- | RACO | Gratis | . |
| ORDO Jahrbuch für die Ordnung von Wirtschaft und Gesellschaft | 2014- | Ebsco Academic | . | . |
| Ore and Energy Resource Geology | 2019- | Elsevier Science | . | . |
| Ore Bin | 1939-1978 | Oregon Department of Geology and Mineral Industries | Gratis | Cambio a: Oregon Geology |
| Ore Geology Reviews | 1986- | Elsevier Science | . | . |
| Ore Geology Reviews | 2022- | Elsevier Science | Gratis | . |
| Oregon Business Magazine | 2007- | Ebsco Academic | . | . |
| Oregon Business Magazine | 1987-2010 | ProQuest Information and Learning | . | . |
| Oregon flora newsletter | 1995-2012 | BioDiversity Heritage Library | Gratis | . |
| Oregon Geology | 1979- | Oregon Deparment of Geology and Mineral Industries | Gratis | Cambio de: Ore Bin |
| Oregon grown gladiolus bulbs : March, 1927 [price list] | 1927-1927 | BioDiversity Heritage Library | Gratis | . |
| Oregon Historical Quarterly | 1926- excepto últimos 36 meses | JSTOR | . | Cambio de: Quarterly of the Oregon Historical Society, The |
| Oregon naturalist | 1894-1898 | BioDiversity Heritage Library | Gratis | . |
| Oregon Nurse | 1995-2015 | Ebsco Academic | . | . |
| Oregon sportsman | 1913-1918 | BioDiversity Heritage Library | Gratis | . |
| Oregon Wheat | 2004- | Ebsco Academic | . | . |
| Oregon's Agricultural Progress | 1996- | Oregon State University Extension and Experiment Station | Gratis | . |
| Orensano periódico gallego | 1944-1945 | Galiciana | Gratis | . |
| Orfeu | 2016- | Universidade do Estado de Santa Catarina | Gratis | . |
| Org & Demo | 2000- | Universidade Estadual Paulista (UNESP) | Gratis | . |
| Organ | 2007- | Ebsco Academic | . | . |
| Organ alternatives | 1998-2004 | OrgAt.com | Gratis | . |
| Organ Biology | 2011- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Organ Biology | 2023- | Ebsco Academic | . | . |
| Organ Medicine | 2024- | Wiley Online Library | Gratis | . |
| Organ Transplantation Qi Guan Yi Zhi | 2014- | Ebsco Academic | . | . |
| Organelles Proteomics | 2014-2014 | Portico | Gratis | . |
| Organic Agriculture | 2011- | Springer | . | . |
| Organic Agriculture | 2019- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Organic and Biomolecular Chemistry | 2003- | Royal Society of Chemistry | . | . |
| Organic and Medicinal Chemistry Letters | 2011-2014 | PubMed Central | Gratis | . |
| Organic and Medicinal Chemistry Letters | 2011-2014 | SpringerOpen | Gratis | . |
| Organic and Medicinal Chemistry Letters | 2011-2014 | ProQuest Information and Learning | . | . |
| Organic Chemistry Frontiers | 2013- | Royal Society of Chemistry | Gratis | . |
| Organic Chemistry Insights | 2008- | CLOCKSS | Gratis | . |
| Organic Chemistry Insights | 2008-2016 | ProQuest Information and Learning | . | . |
| Organic Chemistry Insights | 2008-2016 | Ebsco Academic | . | . |
| Organic Chemistry International | 2009-2017 | Ebsco Academic | . | . |
| Organic Chemistry International | 2008-2016 | Hindawi Publishing Corporation | Gratis | . |
| Organic Chemistry International | 2014-2016 | ProQuest Information and Learning | . | . |
| Organic Communications | 2008- | ACG Publications | Gratis | . |
| Organic Communications | 2008- | Ebsco Academic | . | . |
| Organic Communications | 2008- | ProQuest Information and Learning | . | . |
| Organic Electronics | 2000- | Elsevier Science | . | . |
| Organic Farming | 2015- | Librelloph | Gratis | . |
| Organic Gardening | 2003-2015 | Ebsco Academic | . | Cambio a: Organic Gardening |
| Organic Gardening | 1995-2015 | ProQuest Information and Learning | . | Cambio a: Organic Gardening |
| Organic Gardening 08973792 | 1990-2001 | Ebsco Academic | . | . |
| Organic Geochemistry | 1980- | Elsevier Science | . | . |
| Organic Letters | 1999- | American Chemical Society | . | . |
| Organic Materials | 2019- | Thieme | Gratis | . |
| Organic Photonics and Photovoltaics | 2013- | de Gruyter | Gratis | . |
| Organic Preparations & Procedures International | 1997- | Taylor & Francis | . | . |
| Organic Process Research and Development | 1997- | American Chemical Society | . | . |
| Organic Spa Magazine | 2009-2022 | Ebsco Academic | . | . |
| Organic Syntheses | 1921- | CambridgeSoft | Gratis | . |
| Organics | 2020- | MDPI AG | Gratis | . |
| Organics | 2020- | ProQuest Information and Learning | . | . |
| Organics | 2022- | Ebsco Academic | . | . |
| Organisation and activity of the I.R. Agricultural society of Vienna | 1913-1913 | BioDiversity Heritage Library | Gratis | . |
| Organisational and Social Dynamics | 2010-2021 | ProQuest Information and Learning | . | . |
| Organisational Project Management | 2014-2016 | UTSePress | Gratis | . |
| Organisational Project Management | 2015-2015 | Ebsco Academic | . | . |
| Organisationsberatung Supervision Coaching | 2000- | Springer | . | . |
| Organisationsentwicklung | 2019- | Ebsco Academic | . | . |
| Organised Sound | 1996- | Cambridge University Press | . | . |
| Organised Sound | 2001- excepto últimos 12 meses | ProQuest Information and Learning | . | . |
| Organisms Diversity & Evolution | 2001-2009 | Elsevier Science | . | . |
| Organisms Diversity & Evolution | 2010- | Springer | . | . |
| Organisms Diversity & Evolution Electronic Supplement | 2001-2006 | Gesellschaft fur Biologische Systematik (GfBS) (Germany) | Gratis | . |
| Organisms Journal of Biological Sciences | 2017- | Sapienza Università di Roma | Gratis | . |
| Organisms Journal of Biological Sciences | 2023- | Ebsco Academic | . | . |
| Organists' Review | 2006- | Ebsco Academic | . | . |
| Organizacija | 2008- | Sciendo | Gratis | . |
| Organizacija | 2008- | ProQuest Information and Learning | . | . |
| Organizacija | 2015- | Ebsco Academic | . | . |
| Organizacija Znanja | 2011- | ProQuest Information and Learning | . | . |
| Organizações & Sociedade | 2000- | Universidade Federal da Bahia | Gratis | . |
| Organizações & Sociedade | 1996- | SciELO (Brasil) | Gratis | . |
| Organizações & Sociedade | 2005- | Red ALyC | Gratis | . |
| Organizações e Sustentabilidade | 2013- | Universidade Estadual de Londrina | Gratis | . |
| Organizações e Sustentabilidade | 2015- | Ebsco Academic | . | . |
| Organizações Rurais e Agroindustriais | 1996- | Universidade Federal de Lavras | Gratis | . |
| Organizações Rurais e Agroindustriais | 2005- | Red ALyC | Gratis | . |
| Organizações Rurais e Agroindustriais | 2000- | University of Minnesota Libraries | Gratis | . |
| Organizações Rurais e Agroindustriais | 2012- | Ebsco Academic | . | . |
| Organization | 1999- | Sage Journals | . | . |
| Organization | 1994- excepto últimos 12 meses | Ebsco Academic | . | . |
| Organization | 2002-2007 | ProQuest Information and Learning | . | . |
| Organization & Environment | 1999- | Sage Journals | . | . |
| Organization & Environment | 1997-2007 | ProQuest Information and Learning | . | . |
| Organization & Environment | 2009- | Ebsco Academic | . | . |
| Organization & Management Quarterly | 2015- | Ebsco Academic | . | . |
| Organization and Management | 2010- | Polska Akademia Nauk | Gratis | . |
| Organization and Management | 2010- | ProQuest Information and Learning | . | . |
| Organization Development Journal | 2004- | Ebsco Academic | . | . |
| Organization Development Journal | 1998- | ProQuest Information and Learning | . | . |
| Organization Development Review | 2019- | Ebsco Academic | . | . |
| Organization Management Journal | 2007- | ProQuest Information and Learning | . | . |
| Organization Management Journal | 2020- | Emerald | Gratis | . |
| Organization Management Journal Palgrave Macmillan Ltd | 2004-2010 | Ebsco Academic | . | . |
| Organization Review PrzeglÄ…d Organizacji | 2020- | Ebsco Academic | . | . |
| Organization Science | 1990- excepto últimos 60 meses | JSTOR | . | . |
| Organization Science | 1998- | INFORMS | . | . |
| Organization Science | 1990- excepto últimos 60 meses | Ebsco Academic | . | . |
| Organization Science | 1999-2009 | ProQuest Information and Learning | . | . |
| Organization Studies | 1999- | Sage Journals | . | . |
| Organization Studies | 1980- excepto últimos 12 meses | Ebsco Academic | . | . |
| Organization Technology & Management in Construction | 2009-2012 | Hrcak | Gratis | . |
| Organization Technology & Management in Construction | 2009- | ProQuest Information and Learning | . | . |
| Organization Technology & Management in Construction | 2016- | Sciendo | Gratis | . |
| Organization Technology & Management in Construction | 2012- | Ebsco Academic | . | . |
| Organization Theory 2631 7877 | 2023- | Ebsco Academic | . | . |
| Organization Theory 2631 7877 | 2020- | Sage Journals | . | . |
| Organizational aesthetics | 2007- | Society for Organizational Aesthetics Research | Gratis | . |
| Organizational Analysis | 2004 | Emerald | . | Cambio de: The International Journal of Organizational Analysis
Cambio a: International Journal of Organizational Analysis |
| Organizational Analysis | 2004-2005 | Ebsco Academic | . | Cambio de: The International Journal of Organizational Analysis
Cambio a: International Journal of Organizational Analysis |
| Organizational Behavior and Human Decision Processes | 1985- | Elsevier Science | . | Cambio de: Organizational Behavior and Human Performance |
| Organizational Behavior and Human Performance | 1966-1984 | Elsevier Science | . | . |
| Organizational Change and Innovation | 2011- | Springer Series | . | . |
| Organizational Culture Management | 2014- | Ebsco Academic | . | . |
| Organizational Cultures An International Journal | 2014- | Ebsco Academic | . | . |
| Organizational Cultures An International Journal | 2013- | ProQuest Information and Learning | . | . |
| Organizational Cybersecurity Journal Practice Process and People | 2021- | ProQuest Information and Learning | . | . |
| Organizational Cybersecurity Journal Practice Process and People | 2021- | Emerald | Gratis | . |
| Organizational Dynamics | 1972- | Elsevier Science | . | . |
| Organizational Dynamics | 1972-2001 | Ebsco Academic | . | . |
| Organizational Economics Proceedings | 2012- | University of Sydney | Gratis | . |
| Organizational Psychology Review | 2011- | Sage Journals | . | . |
| Organizational Research Methods | 1999- | Sage Journals | . | . |
| Organizational Research Methods | 2009- | Ebsco Academic | . | . |
| Organizational Research Methods | 2001-2007 | ProQuest Information and Learning | . | . |
| Organizational Science | 2012- excepto últimos 12 meses | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Organizational Science | 2020- | Ebsco Academic | . | . |
| Organizations & Markets in Emerging Economies | 2010- | Ebsco Academic | . | . |
| Organizations & Markets in Emerging Economies | 2010- | CEEOL | Gratis | . |
| Organizations & Markets in Emerging Economies | 2010-2022 | ProQuest Information and Learning | . | . |
| Organized Crime Digest | 2000-2007 | ProQuest Information and Learning | . | . |
| Organizing Strategies in Women's Health | 1994-1994 | ProQuest Information and Learning | . | . |
| Organogenesis | 2004- | Taylor & Francis | Gratis | . |
| Organogenesis | 2004- | PubMed Central | Gratis | . |
| Organoids | 2022- | MDPI AG | Gratis | . |
| Organoids | 2022- | Ebsco Academic | . | . |
| Organometallics | 1982- | American Chemical Society | . | . |
| Organon | 1995- | Universidade Federal do Rio Grande do Sul | Gratis | . |
| Organon | 2012- | Ebsco Academic | . | . |
| Organon | 2014- | ProQuest Information and Learning | . | . |
| Organon 00786500 | 2013- | Ebsco Academic | . | . |
| Organon F International journal of analytic philosophy | 1994-2018 | Filosofický ústav Akademie věd České republiky | Gratis | . |
| Organon F International journal of analytic philosophy | 2013- | Ebsco Academic | . | . |
| Organon F International journal of analytic philosophy | 1994- | Slovak Academy of Sciences | Gratis | . |
| Organs-on-a-Chip | 2019- | Elsevier Science | Gratis | . |
| Organum | 2018- | Universitas Winaya Mukti | Gratis | . |
| ORH Observatorio de Recursos Humanos | 2019- | Ebsco Academic | . | . |
| Oriens | 1948- excepto últimos 60 meses | JSTOR | . | . |
| Oriens | 2010- excepto últimos 36 meses | Ebsco Academic | . | . |
| Orient | 1960-2020 | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis | . |
| Orient Aviation | 2022- | ProQuest Information and Learning | . | . |
| Orient Bulletin | 1999- | Zentrum Moderner Orient | Gratis | . |
| Orient Deutsche Zeitschrift für Politik Wirtschaft und Kultur des Orients | 2007- | Deutsche Orient-Stiftung | Gratis | . |
| Orientación gallega | 1962-1965 | Galiciana | Gratis | . |
| Orientacion y Sociedad Revista Internacional e Interdisciplinaria de Orientacion Vocacional Ocupacional | 1999- | SciELO (Argentina) | Gratis | . |
| Orientacion y Sociedad Revista Internacional e Interdisciplinaria de Orientacion Vocacional Ocupacional | 1999- | Universidad Nacional de la Plata | Gratis | . |
| Oriental annual, or, Scenes in India / | 1834-1840 | BioDiversity Heritage Library | Gratis | . |
| Oriental Anthropologist | 2001- | Sage Journals | . | . |
| Oriental Anthropologist | 2010-2018 | ProQuest Information and Learning | . | . |
| Oriental Insects | 1997- | Taylor & Francis | . | . |
| Oriental Journal of Chemistry | 2008- | Oriental Scientific Publishing | Gratis | . |
| Oriental Journal of Chemistry | 2008- | ProQuest Information and Learning | . | . |
| Oriental Journal of Computer Science and Technology | 2008- | Oriental Scientific Publishing Company | Gratis | . |
| Oriental pharmacy and experimental medicine. | 2011-2019 | Springer | . | Cambio de: International journal oriental pharmacy and experimental medicine | Cambio a: Advances in Traditional Medicine |
| Oriental serial publications in the zoological sciences | 1963 | BioDiversity Heritage Library | Gratis | . |
| Oriental Studies | 2008- | elpub.ru | Gratis | . |
| Oriental Studies Shodoznavstvo | 2023- | Ebsco Academic | . | . |
| Orientalia Suecana | 1952- | Uppsala University | Gratis | . |
| Orientaliska Studier | 2022- | Ebsco Academic | . | . |
| Orientalistische Literaturzeitung Zeitschrift für die Wissenschaft vom ganzen Orient und seinen Beziehungen zu den angrenzenden Kulturkreisen | 1995- | de Gruyter | . | . |
| Orientando | 2011- | Universidad Veracruzana | Gratis | . |
| Orientations | 2013-2020 | Ebsco Academic | . | . |
| Oriente Moderno | 1922- excepto últimos 36 meses | JSTOR | . | . |
| Oriente Moderno | 2013- excepto últimos 36 meses | Ebsco Academic | . | . |
| Orientes do Portugues | 2019- | Universidade do Porto | Gratis | . |
| Originais reprovados A revista literária dos alunos de USP | 2009- | USP Portal del Revistas | Gratis | . |
| Original Dock and Canal List etc | 1811-1817 | Gale MOMW | . | . |
| Original Internist | 2008- | Ebsco Academic | . | . |
| Origination News | 2008-2014 | Ebsco Academic | . | . |
| Origination News | 1994-2014 | ProQuest Information and Learning | . | . |
| Origini | 2015- | Ebsco Academic | . | . |
| Origins and Design | 1996-1999 | Access Research Network | Gratis | . |
| Origins of life | 1974-1984 | Springer | . | Cambio de: Space life sciences | Cambio a: Origins of Life and Evolution of Biospheres |
| Origins of Life and Evolution of Biospheres | 1985- | Springer | . | Cambio de: Origins of life |
| Origins of Life and Evolution of Biospheres | 2011- excepto últimos 12 meses | Ebsco Academic | . | Cambio de: Origins of life |
| Origins of Life and Evolution of Biospheres | 1997- excepto últimos 12 meses | ProQuest Information and Learning | . | Cambio de: Origins of life |
| Origins Studies in the Sources of Scientific Creativity | 2009 | Springer Series | . | . |
| Orillas Studi d'ispanistica | 2012- | Padova University Press | Gratis | . |
| Orillia Today | 2003- | ProQuest Information and Learning | . | . |
| Orinoquia | 2003- | Red ALyC | Gratis | . |
| Orinoquia | 2004-2012 | Imbiomed | Gratis
Registro individual requerido | . |
| Orinoquia | 2011- | Dialnet | Gratis | . |
| Orinoquia | 2010- | SciELO (Colombia) | Gratis | . |
| Orinoquia | 2003- | Universidad de Los Llanos | Gratis | . |
| oriole : official organ of the Somerset Hills Bird Club | 1914-1915 | BioDiversity Heritage Library | Gratis | . |
| Oriole The Quarterly Journal of the Georgia Ornithological Society | 2005-2013 | SORA | Gratis | . |
| Oriole The Quarterly Journal of the Georgia Ornithological Society | 1936-2006 | Georgia Ornithological Society | Gratis | . |
| Orion | 2006- | Ebsco Academic | . | . |
| Orion | 1985- | Operations Research Society of South Africa (ORSSA) | Gratis | . |
| Orion | 2006- | ProQuest Information and Learning | . | . |
| ORiON | 2004- | AJOL | Gratis | . |
| Orion Magazine | 2011- | Ebsco Academic | . | . |
| Orissa Journal of Otolaryngology and Head & Neck Surgery | 2023- | MedKnow | Gratis | . |
| Orissa Journal of Psychiatry | 2006-2012 | Indian Psychiatric Society | Gratis | . |
| Orissa Journal of Psychiatry | 2022- | MedKnow | Gratis | . |
| Orissa review | 1972-1994 | Government of Orissa | Gratis | . |
| Orizzonte Cina | 2010- | Università di Torino | Gratis | . |
| ORL journal for oto rhino laryngology and its related specialties | 2009-2010 | PubMed Central | Gratis
Artículos selectos | . |
| ORL journal for oto rhino laryngology and its related specialties | 1998- | Karger Publishers | . | . |
| ORL journal for oto rhino laryngology and its related specialties | 1998-2015 | ProQuest Information and Learning | . | . |
| ORL ro | 2015- | MedicHub Media | Gratis | . |
| ORL ro | 2013- | Ebsco Academic | . | . |
| Orlando Business Journal | 1996- | American City Business Journals Inc. | Gratis | . |
| Orlando Business Journal | 1999-2004 | ProQuest Information and Learning | . | . |
| Orlando Sentinel | 1985- | ProQuest Information and Learning | . | . |
| Orleans EMC | 2009-2018 | ProQuest Information and Learning | . | . |
| ORNAC Journal | 2012-2022 | Ebsco Academic | . | . |
| ORNAC Journal | 2003-2022 | ProQuest Information and Learning | . | . |
| Ornament | 1997-2015 | Ebsco Academic | . | . |
| Ornament | 2005- | ProQuest Information and Learning | . | . |
| Ornamental Horticulture | 1995- | Sociedade Brasileira de Floricultura e Plantas Ornamentais | Gratis | . |
| Ornamental Horticulture | 2017- | SciELO (Brasil) | Gratis | . |
| Ornamental Outlook | 1998-2009 | ProQuest Information and Learning | . | . |
| Ornamental Plant Research | 2021- | Maximum Academic Press | Gratis | . |
| Ornis | 1886-1910 | BioDiversity Heritage Library | Gratis | . |
| Ornis | 1885-1910 | BioDiversity Heritage Library | Gratis | . |
| Ornis Fennica | 2010- | ProQuest Information and Learning | . | . |
| Ornis Fennica | 2012- | Ebsco Academic | . | . |
| Ornis Fennica | 2021- | BirdLife Finland | Gratis | . |
| Ornis Hungarica Scientific Journal of the BirdLife Hungary | 1991- | Hungarian Ornithological and Nature Conservation Society | Gratis | . |
| Ornis Hungarica Scientific Journal of the BirdLife Hungary | 2012- | Sciendo | Gratis | . |
| Ornis Hungarica Scientific Journal of the BirdLife Hungary | 2014- | Ebsco Academic | . | . |
| Ornis Hungarica Scientific Journal of the BirdLife Hungary | 2012- | ProQuest Information and Learning | . | . |
| Ornis Scandinavica | 1970-1993 | JSTOR | . | Cambio a: Journal of Avian Biology |
| Ornis Svecica | 2019- | Ebsco Academic | . | . |
| Ornithological Applications | 2021- | Oxford Academic | . | Cambio de: Condor, The |
| Ornithological Applications | 2021- | Bioone | . | Cambio de: Condor, The |
| Ornithological Monographs | 1964-2005 | SORA | Gratis | . |
| Ornithological Monographs | 1964- excepto últimos 36 meses | JSTOR | . | . |
| Ornithological Monographs | 2006-2014 | Bioone | . | . |
| Ornithological Monographs | 2008-2012 | ProQuest Information and Learning | . | . |
| Ornithological Newsletter | 1997- | Ornithological Societies of North America (OSNA) | Gratis | . |
| Ornithological report | 1965-1988 | BioDiversity Heritage Library | Gratis | . |
| Ornithological Science | 2002- | J-STAGE, Japan Science and Technology Information Aggregator, Electronic | Gratis
selecciones disponibles | . |
| Ornithological Science | 2005- | Bioone | . | . |
| Ornithologische Monatsberichte | 1894-1923 | BioDiversity Heritage Library | Gratis | . |
| Ornithologische Monatsschrift | 1890-1922 | BioDiversity Heritage Library | Gratis | . |
| Ornithologischer Anzeiger | 1991- | Landesmuseum | Gratis | Cambio de: Anzeiger der Ornithologischen Gesellschaft in Bayern |
| Ornithologischer Rundbrief für Mecklenburg-Vorpommern | 2004- | Ornithologische Arbeitsgemeinschaft Mecklenburg-Vorpommern | Gratis | . |
| Ornithologisches Centralblatt | 1880-1882 | BioDiversity Heritage Library | Gratis | . |
| Ornithologisches Centralblatt | 1876-1879 | BioDiversity Heritage Library | Gratis | . |
| Ornithologisches Jahrbuch | 1890-1918 | BioDiversity Heritage Library | Gratis | . |
| Ornithologist | 1885-1885 | BioDiversity Heritage Library | Gratis | . |
| Ornithologist and botanist | 1891-1892 | BioDiversity Heritage Library | Gratis | . |
| Ornithologist and oölogist | 1881-1893 | BioDiversity Heritage Library | Gratis | . |
| Ornithologist; a magazine of ornithology and oölogy | 1896-1897 | BioDiversity Heritage Library | Gratis | . |
| Ornithologists' and Oologists' Semi-Annual | 1889-1891 | BioDiversity Heritage Library | Gratis | Cambio a: Semi-Annual (Agassiz Association. Department of the Wilson Chapter) |
| Ornithologists' and Oologists' Semi-Annual | 1889-1890 | JSTOR | Gratis | Cambio a: Semi-Annual (Agassiz Association. Department of the Wilson Chapter) |
| Ornithology | 2021- | Oxford Academic | . | Cambio de: Auk, The |
| Ornithology | 2021- | Bioone | . | Cambio de: Auk, The |
| Ornithology Research | 2014- | Springer | . | . |
| Ornitología Colombiana | 2003- | Asociación Colombiana de Ornitología | Gratis | . |
| Ornitologia Neotropical | 1990-2014 | SORA | Gratis | . |
| Ornitologia Neotropical | 2015- | Simon Fraser University | Gratis | . |
| Ornitologia Neotropical | 2023- | Ebsco Academic | . | . |
| Ornitologicheskii viestnik | 1910-1917 | BioDiversity Heritage Library | Gratis | . |
| ORNL Review Oak Ridge National Laboratory | 1967- | U.S. Department of Energy, Oak Ridge National Laboratory | Gratis | . |
| Oromia Law Journal | 2012- | AJOL | Gratis | . |
| Orphan Drugs Research & Reviews | 2011-2017 | Dove Medical Press | Gratis | . |
| Orphan Drugs Research & Reviews | 2011-2017 | ProQuest Information and Learning | . | . |
| Orphanet Journal of Rare Diseases | 2006- | PubMed Central | Gratis | . |
| Orphanet Journal of Rare Diseases | 2006- | BioMed Central | Gratis | . |
| Orphanet Journal of Rare Diseases | 2006- | Ebsco Academic | . | . |
| Orphanet Journal of Rare Diseases | 2009- | ProQuest Information and Learning | . | . |
| Orquideología | 2013- | Sociedad Colombiana de Orquideología | Gratis | . |
| ORSA Journal on Computing | 1989-1996 | Operations Research Society of America | Gratis | . |
| ORSA Journal on Computing | 1989-1995 | Ebsco Academic | . | . |
| ORSEA Journal | 2021- | Ebsco Academic | . | . |
| Orsis Organismes i Sistemes | 1985-2017 | Universidad Autónoma de Barcelona | Gratis | . |
| Orsis Organismes i Sistemes | 1985-2017 | RACO | Gratis | . |
| Orsis Organismes i Sistemes | 2014-2017 | Universidad Autónoma de Barcelona | Gratis | . |
| Orta Asya ve Kafkasya Arastirmalari | 2011-2015 | ProQuest Information and Learning | . | . |
| Ortadogu Medical Journal Ortadogu Tip Dergisi | 2011-2020 | Ebsco Academic | . | . |
| Ortadogu Yilligi | 2011-2014 | ProQuest Information and Learning | . | . |
| ORTESOL Journal | 2003- | ProQuest Information and Learning | . | . |
| Orthodontic Journal of Nepal | 2011- | Nepal Journals Online | Gratis | . |
| Orthodontic Products | 2007- | Ebsco Academic | . | . |
| Orthodontic Waves | 2006-2019 | Elsevier Science | . | . |
| Orthodontic Waves | 2006-2021 | Taylor & Francis | . | . |
| Orthodontics & Craniofacial Research | 2002- | Wiley Online Library | . | Cambio de: Clinical Orthodontics and Research |
| Orthodontics & Craniofacial Research | 2002- excepto últimos 12 meses | Ebsco Academic | . | Cambio de: Clinical Orthodontics and Research |
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| Orthomolecular psychiatry | 1972-1973 | Academy of Orthomolecular Psychiatry | Gratis | Cambio de: Schizophrenia | Cambio a: Journal of orthomolecular psychiatry |
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| Orthopaedic Nursing | 2000-2007 | Ebsco Academic | . | . |
| Orthopaedic Nursing | 2015- | Ovid Technologies, Inc. | . | . |
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| Orthopedic Reviews | 2009-2021 | ProQuest Information and Learning | . | . |
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Registro individual requerido | . |
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Artículos selectos | . |
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