| #1391 | Preslia : časopis České botanické společnosti. -- Praha : Česká botanická společnost, 1914-. -- ISSN 0032-7786 |
| #1392 | Prikladnaja biochimija i mikrobiologija. -- Moskva : Nauka, 1965-. -- ISSN 0555-1099 |
| #1393 | Prilozi - Makedonska akademija na naukite i umetnostite, Oddelenie za biološki i medicinski nauki. -- Skopje : Makedonska akad. na naukite i umetnostite, 1980-. -- ISSN 0351-3254 |
| #1394 | Primates. -- Inuyama : Japan Monkey Centre., 1957-. -- ISSN 0032-8332 |
| #1395 | Prion. -- Austin : Landes Bioscience, 2007-. -- ISSN 1933-6896 print. -- ISSN 1933-690X online |
| #1396 | Priroda. -- Zagreb : Hrvatsko prirodoslovno društvo, 1911-. -- ISSN 0351-0662 |
| #1397 | Proceedings of the California Academy of Sciences. -- San Francisco : California Academy of Sciences, 1907-. -- ISSN 0068-547X |
| #1398 | Proceedings of the Estonian Academy of Sciences, Biology, ecology. -- Tallin : Estonian academy publishers, 1997-. -- ISSN 1406-0914 |
| #1399 | Proceedings of the Indian Academy of Sciences. Section B, Biological sciences. -- Indie : Bangalore : Indian Academy of Sciences, 1934-1979. -- ISSN 0370-0097 |
| #1400 | Proceedings of the Indian National Science Academy, Part B, Biological sciences. -- New Delhi : Indian National Science Academy, 1955-. -- ISSN 0073-6600 |