| Prisma Social | PRISMA SOCIAL | 1989-3469 |
| Prison Journal | PRISON J | 0032-8855 |
| Prispevki za Novejso Zgodovino | | 0353-0329 |
| Privredna Kretanja i Ekonomska Politika | PRIVREDNA KRETANJA I EKONOMSKA POLITIKA | 1330-187X |
| Pro Dialog Computer Programming and Applications | | |
| Pro Fide Rege et Lege | | 0867-6771 |
| Pro Lusatia. Opolskie Studia ŁuŻyczoznawcze | | |
| Pro Memorie. Bijdragen Tot de Rechtsgeschiedenis Der Nederlanden | | 1566-7146 |
| Pro Musica Sacra | | 2083-4039 |
| Pro Philosophia Füzetek - Pro Scientia Humana Vesprimiensi Alapítvány, Veszprém (ceased) | | 1219-1639 |
| Pro-Fil | PRO-FIL | 1212-9097 |
| Probabilistic Engineering Mechanics | PROBABILIST ENG MECH | 0266-8920 |
| Probability and Mathematical Statistics-Poland | | 0208-4147 |
| Probability in the Engineering and Informational Sciences | PROBAB ENG INFORM SC | 0269-9648 |
| Probability Surveys | PROBABILITY SURVEYS | 1549-5787 |
| Probability Theory and Related Fields | PROBAB THEORY REL | 0178-8051 |
| Probability Uncertainty and Quantitative Risk | PROBABILITY UNCERTAINTY AND QUANTITATIVE RISK | 2367-0126 |
| Probation Journal | PROBATION JOURNAL | 0264-5505 |
| Probiotics and Antimicrobial Proteins | PROBIOTICS AND ANTIMICROBIAL PROTEINS | 1867-1306 |
| Problema | PROBLEMA | 2007-4387 |
| Problemas del Desarrollo | PROBLEMAS DEL DESARROLLO | 0301-7036 |
| Problemele Energeticii Regionale | PROBLEMELE ENERGETICII REGIONALE | 1857-0070 |
| Problemi | PROBLEMI | 0555-2419 |
| Problemi di Critica Goldoniana | | 1127-2570 |
| Problemi Endokrinnoi Patologii | PROBLEMI ENDOKRINNOI PATOLOGII | 2227-4782 |
| Problemos | PROBLEMOS | 1392-1126 |
| Problems and Perspectives in Management | PROBLEMS AND PERSPECTIVES IN MANAGEMENT | 1727-7051 |
| Problems of Atomic Science and Technology | PROBL ATOM SCI TECH | 1562-6016 |
| Problems of Atomic Science and Technology, Series Thermonuclear Fusion | PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY, SERIES THERMONUCLEAR FUSION | 0202-3822 |
| Problems of Cryobiology and Cryomedicine | PROBLEMS OF CRYOBIOLOGY AND CRYOMEDICINE | 2307-6143 |
| Problems of Education in the 21st Century | | 1822-7864 |
| Problems of Forensic Sciences / Z Zagadnien Nauk Sadowych | | |
| Problems of Forensic Sciences / Z ZagadnieŃ Nauk SĄdowych | | |
| Problems of Information Transmission | PROBL INFORM TRANSM+ | 0032-9460 |
| Problems of modern science and education | PROBLEMS OF MODERN SCIENCE AND EDUCATION | 2304-2338 |
| Problems of Post-Communism | PROBL POST-COMMUNISM | 1075-8216 |
| Problems of Tribology | | |
| Problemy Analiza-Issues of Analysis | PROBLEMY ANALIZA-ISSUES OF ANALYSIS | 2306-3424 |
| Problemy Ekologii | | |
| Problemy Ekologii Krajobrazu | | 1899-3850 |
| Problemy Ekologii Krajobrazu / the Problems of Landscape Ecology | | |
| Problemy Ekorozwoju | PROBL EKOROZW | 1895-6912 |
| Problemy Ekorozwoju / Problems of Sustainable Development | | |
| Problemy Ekorozwoju. Studia Filozoficznosozologiczne | | |
| Problemy Eksploatacji | | |
| Problemy Eksploatacji. Maintenance Problems | | 1232-9312 |
| Problemy Endokrinologii | PROBLEMY ENDOKRINOLOGII | 0375-9660 |
| Problemy Higieny i Epidemiologii | | 1895-4316 |
| Problemy Inżynierii Rolniczej | | 1231-0093 |
| Problemy Istoricheskoi Poetiki | PROBLEMY ISTORICHESKOI POETIKI | 1026-9479 |
