| #2271 | Proceedings - Royal Society, Biological sciences. -- London : Royal Society, 1990-. -- ISSN 0962-8452 print. -- ISSN 1471-2954 online |
| #2272 | Process engineering. -- London : Morgan-Grampian, 1972-. -- ISSN 0370-1859 |
| #2273 | Processing. -- Tonbridge : IML Group Publ., 1974-1999. -- ISSN 0305-439X |
| #2274 | Programmirovanie. -- Moskva : Akademija nauk. -- ISSN 0132-3474 |
| #2275 | Programnyje produkty i sistemy. -- Kalinin : Meždunarodnyj naučno-issledovatel´skij institut problem upravleniâ, 1988-. -- ISSN 0236-235X |
| #2276 | Le Progres scientifique. -- Paris : Documentation française, 1961-1981. -- ISSN 0033-0469 |
| #2277 | Progress in biophysics and molecular biology. -- Oxford : Pergamon Press, 1963-. -- ISSN 0079-6107 print. -- ISSN 1873-1732 online |
| #2278 | Progress in nucleic acid research and molecular biology. -- New York : Academic Press, 1964-. -- ISSN 0079-6603 |
| #2279 | Progress in reaction kinetics and mechanism. -- Northwood : Science and Technology Letters, 1999-. -- ISSN 1468-6783 |
| #2280 | Promyšlennaja energetika. -- Moskva : Ènergia, 1956-. -- ISSN 0033-1155 |