| #1431 | Ptačí svět. -- Praha : Česká společnost ornitologická, 1994-. -- ISSN 1801-7525 |
| #1432 | PTR. Phytotherapy research. -- Chichester : Wiley Interscience, 1987-. -- ISSN 0951-418X print. -- ISSN 1099-1573 online |
| #1433 | Quarterly journal of experimental physiology. -- Cambridge : Cambridge University Press, 1981-1989. -- ISSN 0144-8757 |
| #1434 | The Quarterly review of biology. -- Baltimore : Williams & Wilkins, 1926-. -- ISSN 0033-5770 print. -- ISSN 1539-7718 online |
| #1435 | Quarterly reviews of biophysics. -- London : Cambridge University Press, 1968-. -- ISSN 0033-5835 print. -- ISSN 1469-8994 online |
| #1436 | Radiacionnaja biologija radioèkologija. -- Moskva : Nauka, 1993-. -- ISSN 0869-8031 |
| #1437 | Radiation and environmental biophysics. -- Berlin : Springer, 1974-. -- ISSN 0301-634X print. -- ISSN 1432-2099 online |
| #1438 | Radiation research. -- San Diego : Academic Press, 1954-. -- ISSN 0033-7587 print. -- ISSN 1938-5404 online |
| #1439 | Rádioaktivita a životné prostredie. -- Slovensko : Košice : Ústav rádioekológie a využitia jadrovej techniky,, 1978-1990. -- ISSN 0231-8857 |
| #1440 | Rastitel'nyje resursy. -- Moskva : Nauka, 1965-. -- ISSN 0033-9946 |