Title Frequency ISSN
OBESITY RESEARCH Bimonthly (6 issues) 1071-7323
OBESITY SURGERY Bimonthly (6 issues) 0960-8923
OBJECT ORIENTED SYSTEMS Quarterly (4 issues) 0969-9767
OBJECT-ORIENTED STRATEGIES Monthly (12 issues) 1059-4108
OBSERVATORY Bimonthly (6 issues) 0029-7704
OBSTETRICS AND GYNECOLOGY Monthly (12 issues) 0029-7844
OBSTETRICS AND GYNECOLOGY CLINICS OF NORTH AMERICA Quarterly (4 issues) 0889-8545
OCCUPATIONAL AND ENVIRONMENTAL MEDICINE Monthly (12 issues) 1351-0711
OCCUPATIONAL MEDICINE-OXFORD Bimonthly (6 issues) 0962-7480
OCCUPATIONAL MEDICINE-STATE OF THE ART REVIEWS Quarterly (4 issues) 0885-114X
OCCUPATIONAL THERAPY JOURNAL OF RESEARCH Quarterly (4 issues) 0276-1599
OCEAN & COASTAL MANAGEMENT Bimonthly (6 issues) 0964-5691
OCEAN DEVELOPMENT AND INTERNATIONAL LAW Quarterly (4 issues) 0090-8320
OCEAN ENGINEERING Monthly (12 issues) 0029-8018
OCEANIA Quarterly (4 issues) 0029-8077
OCEANIC LINGUISTICS Twice a year (2 issues) 0029-8115
OCEANOGRAPHY AND MARINE BIOLOGY Annual (1 issue) 0078-3218
OCEANOLOGICA ACTA Quarterly (4 issues) 0399-1784
OCEANUS Twice a year (2 issues) 0029-8182
OCL-OLEAGINEUX CORPS GRAS LIPIDES Bimonthly (6 issues) 1258-8210
OCTOBER Quarterly (4 issues) 0162-2870
OCULAR IMMUNOLOGY AND INFLAMMATION Quarterly (4 issues) 0927-3948
OECOLOGIA Twice a month (24 issues) 0029-8549
OEIL-MAGAZINE INTERNATIONAL D ART Monthly (12 issues) 0029-862X
OHIO JOURNAL OF SCIENCE Bimonthly (6 issues) 0030-0950
OIKOS Monthly (12 issues) 0030-1299
OIL & GAS JOURNAL Weekly (52 issues) 0030-1388
OIL GAS-EUROPEAN MAGAZINE Quarterly (4 issues) 0342-5622
OIL SHALE Quarterly (4 issues) 0208-189X
OKEANOLOGIYA Bimonthly (6 issues) 0030-1574
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE Bimonthly (6 issues) 0305-0483
OMEGA-JOURNAL OF DEATH AND DYING Bimonthly (6 issues) 0030-2228
ONCOGENE Twice a month (24 issues) 0950-9232
ONCOLOGY Bimonthly (6 issues) 0030-2414
ONCOLOGY REPORTS Bimonthly (6 issues) 1021-335X
ONCOLOGY RESEARCH Monthly (12 issues) 0965-0407
ONCOLOGY-NEW YORK Monthly (12 issues) 0890-9091
ONDERSTEPOORT JOURNAL OF VETERINARY RESEARCH Quarterly (4 issues) 0030-2465
ONKOLOGIE Bimonthly (6 issues) 0378-584X
ONLINE Bimonthly (6 issues) 0146-5422
ONLINE & CDROM REVIEW Bimonthly (6 issues) 1353-2642
ONLINE JOURNAL OF KNOWLEDGE SYNTHESIS FOR NURSING Daily (365 issues) 1072-7639
OPEN ECONOMIES REVIEW Quarterly (4 issues) 0923-7992
OPERA Monthly (12 issues) 0030-3526
OPERA NEWS Twice a month (24 issues) 0030-3607
OPERA QUARTERLY Quarterly (4 issues) 0736-0053
OPERATIONS RESEARCH Bimonthly (6 issues) 0030-364X
OPERATIONS RESEARCH LETTERS Monthly (12 issues) 0167-6377
OPERATIVE DENTISTRY Bimonthly (6 issues) 0361-7734
OPERATIVE TECHNIQUES IN SPORTS MEDICINE Quarterly (4 issues) 1060-1872
OPHELIA Three times a year (3 issues) 0078-5326
OPHTHALMIC AND PHYSIOLOGICAL OPTICS Quarterly (4 issues) 0275-5408
OPHTHALMIC GENETICS Quarterly (4 issues) 0167-6784
OPHTHALMIC PLASTIC AND RECONSTRUCTIVE SURGERY Quarterly (4 issues) 0740-9303
OPHTHALMIC RESEARCH Bimonthly (6 issues) 0030-3747
OPHTHALMIC SURGERY AND LASERS Monthly (12 issues) 0022-023X
OPHTHALMOLOGE Monthly (12 issues) 0941-293X
OPHTHALMOLOGICA Bimonthly (6 issues) 0030-3755
OPHTHALMOLOGY Monthly (12 issues) 0161-6420
OPTICA APPLICATA Quarterly (4 issues) 0078-5466
OPTICAL AND QUANTUM ELECTRONICS Monthly (12 issues) 0306-8919
OPTICAL ENGINEERING Monthly (12 issues) 0091-3286
OPTICAL FIBER TECHNOLOGY Quarterly (4 issues) 1068-5200
OPTICAL MATERIALS Bimonthly (6 issues) 0925-3467
OPTICAL REVIEW Bimonthly (6 issues) 1340-6000
OPTICS & PHOTONICS NEWS Monthly (12 issues) 1047-6938
OPTICS AND LASER TECHNOLOGY Bimonthly (6 issues) 0030-3992
OPTICS AND LASERS IN ENGINEERING Monthly (12 issues) 0143-8166
OPTICS AND SPECTROSCOPY Monthly (12 issues) 0030-400X
OPTICS COMMUNICATIONS Twice a month (24 issues) 0030-4018
OPTICS LETTERS Twice a month (24 issues) 0146-9592
OPTIK Monthly (12 issues) 0030-4026
OPTIMAL CONTROL APPLICATIONS & METHODS Quarterly (4 issues) 0143-2087
OPTIMIZATION METHODS & SOFTWARE Quarterly (4 issues) 1055-6788
OPTOMETRY AND VISION SCIENCE Monthly (12 issues) 1040-5488
OR SPEKTRUM Quarterly (4 issues) 0171-6468
ORAL MICROBIOLOGY AND IMMUNOLOGY Bimonthly (6 issues) 0902-0055
ORAL ONCOLOGY Bimonthly (6 issues) 0964-1955
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS Monthly (12 issues) 1079-2104
ORBIS LITTERARUM Bimonthly (6 issues) 0105-7510
ORDER-A JOURNAL ON THE THEORY OF ORDERED SETS AND ITS APPLICATIONS Quarterly (4 issues) 0167-8094
ORE GEOLOGY REVIEWS Bimonthly (6 issues) 0169-1368
OREGON HISTORICAL QUARTERLY Quarterly (4 issues) 0030-4727
ORGANIC GEOCHEMISTRY Monthly (12 issues) 0146-6380
ORGANIC PREPARATIONS AND PROCEDURES INTERNATIONAL Bimonthly (6 issues) 0030-4948
ORGANIC PROCESS RESEARCH & DEVELOPMENT Bimonthly (6 issues) 1083-6160
ORGANIC SYNTHESES Annual (1 issue) 0078-6209
ORGANIZATION Quarterly (4 issues) 1350-5084
ORGANIZATION SCIENCE Bimonthly (6 issues) 1047-7039
ORGANIZATION STUDIES Bimonthly (6 issues) 0170-8406
ORGANIZATIONAL BEHAVIOR AND HUMAN DECISION PROCESSES Monthly (12 issues) 0749-5978
ORGANIZATIONAL DYNAMICS Quarterly (4 issues) 0090-2616
ORGANOMETALLICS Monthly (12 issues) 0276-7333
ORIENTAL ART Quarterly (4 issues) 0030-5278
ORIENTAL INSECTS Annual (1 issue) 0030-5316
ORIGINS OF LIFE AND EVOLUTION OF THE BIOSPHERE Bimonthly (6 issues) 0169-6149
ORL-JOURNAL FOR OTO-RHINO-LARYNGOLOGY AND ITS RELATED SPECIALTIES Bimonthly (6 issues) 0301-1569
ORNIS FENNICA Quarterly (4 issues) 0030-5685
ORTHOPADE Bimonthly (6 issues) 0085-4530
ORTHOPEDIC CLINICS OF NORTH AMERICA Quarterly (4 issues) 0030-5898
ORTHOPEDICS Monthly (12 issues) 0147-7447
ORYX Quarterly (4 issues) 0030-6053
OSAKA JOURNAL OF MATHEMATICS Quarterly (4 issues) 0030-6126
OSIRIS Annual (1 issue) 0369-7827
OSTEOARTHRITIS AND CARTILAGE Quarterly (4 issues) 1063-4584
OSTEOPOROSIS INTERNATIONAL Bimonthly (6 issues) 0937-941X
OSTERREICHISCHE MUSIK ZEITSCHRIFT Monthly (12 issues) 0029-9316
OSTERREICHISCHE ZEITSCHRIFT FUR POLITIKWISSENSCHAFT Quarterly (4 issues) 0378-5149
OSTERREICHISCHE ZEITSCHRIFT FUR VOLKSKUNDE Quarterly (4 issues) 0029-9669
OSTEUROPA Monthly (12 issues) 0030-6428
OSTRICH Three times a year (3 issues) 0030-6525
OTECHESTVENNAYA ISTORIYA Bimonthly (6 issues) 0869-5687
OTO-RHINO-LARYNGOLOGIA NOVA Bimonthly (6 issues) 1014-8221
OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA Quarterly (4 issues) 0030-6665
OTOLARYNGOLOGY-HEAD AND NECK SURGERY Monthly (12 issues) 0194-5998
OUD HOLLAND Quarterly (4 issues) 0030-672X
OUTLOOK ON AGRICULTURE Quarterly (4 issues) 0030-7270
OVERLAND Quarterly (4 issues) 0030-7416
OXFORD ART JOURNAL Twice a year (2 issues) 0142-6540
OXFORD BULLETIN OF ECONOMICS AND STATISTICS Quarterly (4 issues) 0305-9049
OXFORD ECONOMIC PAPERS-NEW SERIES Quarterly (4 issues) 0030-7653
OXFORD GERMAN STUDIES Annual (1 issue) 0078-7191
OXFORD LITERARY REVIEW Annual (1 issue) 0305-1498
OXFORD REVIEW OF ECONOMIC POLICY Quarterly (4 issues) 0266-903X
OXFORD REVIEW OF EDUCATION Quarterly (4 issues) 0305-4985
OXFORD REVIEWS OF REPRODUCTIVE BIOLOGY Annual (1 issue) 0260-0854
OXIDATION COMMUNICATIONS Twice a year (2 issues) 0209-4541
OXIDATION OF METALS Bimonthly (6 issues) 0030-770X
OZONE-SCIENCE & ENGINEERING Quarterly (4 issues) 0191-9512