| Rendiconti Online Societa Geologica Italiana | RENDICONTI ONLINE SOCIETA GEOLOGICA ITALIANA | 2035-8008 |
| Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | RENENG DONGLI GONGCHENG/JOURNAL OF ENGINEERING FOR THERMAL ENERGY AND POWER | 1001-2060 |
| Renewable and Sustainable Energy Reviews | RENEW SUST ENERG REV | 1364-0321 |
| Renewable Agriculture and Food Systems | RENEW AGR FOOD SYST | 1742-1705 |
| Renewable Energy | RENEW ENERG | 0960-1481 |
| Renewable Energy and Power Quality Journal | RENEWABLE ENERGY AND POWER QUALITY JOURNAL | 2172-038X |
| Renewable Resources Journal | RENEWABLE RESOURCES JOURNAL | 0738-6532 |
| Rengong Jingti Xuebao/Journal of Synthetic Crystals | RENGONG JINGTI XUEBAO/JOURNAL OF SYNTHETIC CRYSTALS | 1000-985X |
| Renleixue Xuebao (former Title: Acta Anthropologica Sinica) | | 1000-3193 |
| Rentgenologiya i Radiologiya | RENTGENOLOGIYA I RADIOLOGIYA | 0486-400X |
| Reperes | | 1157-1330 |
| Reperes. Recherche En Didactique Du Français Langue Maternelle | | 0755-7817 |
| Repertorio de Medicina y Cirugia | REPERTORIO DE MEDICINA Y CIRUGIA | 0121-7372 |
| Replay. The Polish Journal of Game Studies | REPLAY. THE POLISH JOURNAL OF GAME STUDIES | 2391-8551 |
| Report - Chr. Michelsen Institute | REPORT - CHR. MICHELSEN INSTITUTE | 0805-505X |
| Report of the Department of Antiquities, Cyprus | | 0070-2374 |
| Reports in Medical Imaging | REPORTS IN MEDICAL IMAGING | 1179-1586 |
| Reports of Biochemistry and Molecular Biology | REPORTS OF BIOCHEMISTRY AND MOLECULAR BIOLOGY | 2322-3480 |
| Reports of Forestry Research-Zpravy Lesnickeho Vyzkumu | REPORTS OF FORESTRY RESEARCH-ZPRAVY LESNICKEHO VYZKUMU | 0322-9688 |
| Reports of Practical Oncology and Radiotherapy | | 1507-1367 |
| Reports On Geodesy | | |
| Reports on Geodesy and Geoinformatics | REPORTS ON GEODESY AND GEOINFORMATICS | 2391-8365 |
| Reports on Mathematical Logic | | 0137-2904 |
| Reports on Mathematical Physics | REP MATH PHYS | 0034-4877 |
| Reports on Progress in Physics | REP PROG PHYS | 0034-4885 |
| Representation | REPRESENTATION | 0034-4893 |
| Representation Theory | REPRESENTATION THEORY | 1088-4165 |
| Representations | REPRESENTATIONS | 0734-6018 |
| Reproducao e Climaterio | REPRODUCAO E CLIMATERIO | 1413-2087 |
| Reproduction | REPRODUCTION | 1470-1626 |
| Reproduction, Fertility and Development | REPROD FERT DEVELOP | 1031-3613 |
| Reproduction in Domestic Animals | REPROD DOMEST ANIM | 0936-6768 |
| Reproduction Nutrition Development | | |
| Reproduction Nutrition Development | REPROD NUTR DEV | 0926-5287 |
| Reproductive and Developmental Medicine | REPRODUCTIVE AND DEVELOPMENTAL MEDICINE | 2096-2924 |
| Reproductive Biology | REPROD BIOL | 1642-431X |
| Reproductive Biology and Endocrinology | REPROD BIOL ENDOCRIN | 1477-7827 |
| Reproductive Biology Insights | REPRODUCTIVE BIOLOGY INSIGHTS | 1178-6426 |
| Reproductive Biomedicine and Society Online | REPRODUCTIVE BIOMEDICINE AND SOCIETY ONLINE | 2405-6618 |
| Reproductive BioMedicine Online | REPROD BIOMED ONLINE | 1472-6483 |
| Reproductive Endocrinology | REPRODUCTIVE ENDOCRINOLOGY | 2309-4117 |
| Reproductive Health | REPRODUCTIVE HEALTH | 1742-4755 |
| Reproductive Health Matters | REPROD HEALTH MATTER | 0968-8080 |
| Reproductive Medicine and Biology | REPRODUCTIVE MEDICINE AND BIOLOGY | 1445-5781 |
| Reproductive Sciences | REPROD SCI | 1933-7191 |
| Reproductive Toxicology | REPROD TOXICOL | 0890-6238 |
| República y Derecho | REPÚBLICA Y DERECHO | 2545-5982 |
| Requirements Engineering | REQUIR ENG | 0947-3602 |
| Res Facta Nova. Teksty o muzyce współczesnej | | 1897-824X |
| ReS Futurae-Revue d Etudes sur la Science-Fiction | RES FUTURAE-REVUE D ETUDES SUR LA SCIENCE-FICTION | 2264-6949 |
