| Regional Studies | REG STUD | 0034-3404 |
| Regional Studies in Marine Science | REGIONAL STUDIES IN MARINE SCIENCE | 2352-4855 |
| Regional Studies Regional Science | REGIONAL STUDIES REGIONAL SCIENCE | 2168-1376 |
| Regions and Cohesion | REGIONS AND COHESION | 2152-906X |
| REGISTER Journal | REGISTER JOURNAL | 1979-8903 |
| Register of the Kentucky Historical Society | REGISTER OF THE KENTUCKY HISTORICAL SOCIETY | 0023-0243 |
| Regular and Chaotic Dynamics | REGUL CHAOTIC DYN | 1560-3547 |
| Regulation & Governance | REGUL GOV | 1748-5983 |
| Regulatory Mechanisms in Biosystems | REGULATORY MECHANISMS IN BIOSYSTEMS | 2519-8521 |
| Regulatory Peptides | REGUL PEPTIDES | 0167-0115 |
| Regulatory Toxicology and Pharmacology | REGUL TOXICOL PHARM | 0273-2300 |
| Rehabilitace a Fyzikalni Lekarstvi | REHABILITACE A FYZIKALNI LEKARSTVI | 1211-2658 |
| Rehabilitacia | REHABILITACIA | 0375-0922 |
| Rehabilitacion | REHABILITACION | 0048-7120 |
| Rehabilitacja Medyczna | | 1427-9622 |
| Rehabilitacja W Praktyce | | 1895-4146 |
| Die Rehabilitation | REHABILITATION | 0034-3536 |
| Rehabilitation Counseling Bulletin | REHABIL COUNS BULL | 0034-3552 |
| Rehabilitation Nursing | REHABIL NURS | 0278-4807 |
| Rehabilitation Oncology | REHABILITATION ONCOLOGY | 2168-3808 |
| Rehabilitation Process and Outcome | REHABILITATION PROCESS AND OUTCOME | 1179-5727 |
| Rehabilitation Psychology | REHABIL PSYCHOL | 0090-5550 |
| Rehabilitation Research and Practice | REHABILITATION RESEARCH AND PRACTICE | 2090-2867 |
| Rehabilitation Research Policy and Education | REHABILITATION RESEARCH POLICY AND EDUCATION | 2168-6653 |
| REICE-Revista Electronica de Investigacion en Ciencias Economicas | REICE-REVISTA ELECTRONICA DE INVESTIGACION EN CIENCIAS ECONOMICAS | 2308-782X |
| REICE-Revista Iberoamericana sobre Calidad Eficacia y Cambio en Educacion | REICE-REVISTA IBEROAMERICANA SOBRE CALIDAD EFICACIA Y CAMBIO EN EDUCACION | 1696-4713 |
| ReiDoCrea-Revista Eectronica de Investigacion y Docencia Creativa | REIDOCREA-REVISTA EECTRONICA DE INVESTIGACION Y DOCENCIA CREATIVA | 2254-5883 |
| Reinardus | | 0925-4757 |
| Rejent | | |
| Rejuvenation Research | REJUV RES | 1549-1684 |
| Relaciones | RELACIONES | 0325-2221 |
| Relaciones Internacionales | RELACIONES INTERNACIONALES | 1515-3371 |
| Relaciones Internacionales-Madrid | RELACIONES INTERNACIONALES-MADRID | 1699-3950 |
| Relations | RELATIONS | 2283-3196 |
| Relations Industrielles-industrial Relations | RELAT IND-IND RELAT | 0034-379X |
| RELC Journal | RELC JOURNAL | 0033-6882 |
| Reliability Engineering and System Safety | RELIAB ENG SYST SAFE | 0951-8320 |
| Reliability: Theory & Applications | | 1932-2321 |
| Reliable Computing | RELIAB COMPUT | 1385-3139 |
| RELIEVE-Revista Electronica de Investigacion y Evaluacion Educativa | | 1134-4032 |
| Religacion-Revista de Ciencias Sociales y Humanidades | RELIGACION-REVISTA DE CIENCIAS SOCIALES Y HUMANIDADES | 2477-9083 |
| Religio | | 1210-3640 |
| Religiologiques: Sciences humaines et religion | | 1180-0135 |
| Religion | | 0048-721X |
| Religion & Education | RELIGION & EDUCATION | 1550-7394 |
| Religion & Human Rights | RELIGION & HUMAN RIGHTS | 1871-031X |
| Religion and Literature | RELIGION & LITERATURE | 0888-3769 |
| Religion and American Culture | RELIGION AND AMERICAN CULTURE-A JOURNAL OF INTERPRETATION | 1052-1151 |
| Religion and Gender | RELIGION AND GENDER | 1878-5417 |
| Religion and Society in Central and Eastern Europe | RELIGION AND SOCIETY IN CENTRAL AND EASTERN EUROPE | 1553-9962 |
