| #481 | Popular mechanics. -- Chicago : Popular Mechanics, 1959-. -- ISSN 0032-4558 |
| #482 | Popular science. -- New York : Popular Science Publ., 1950-. -- ISSN 0161-7370 |
| #483 | Pribory dlja naučnych issledovanij = Review of scientific instruments. -- Moskva : Mir, 1961-. -- ISSN 0130-8556 |
| #484 | Proceedings of the American Institute of Electrical Engineers. -- New York : American Institute of Electrical Engineers, 1905-1919. -- ISSN 0097-2444 print. -- ISSN 2376-7758 online |
| #485 | Proceedings of the Estonian Academy of Sciences. -- Tallinn : Estonian Academy Publishers, 2008-. -- ISSN 1736-6046 print. -- ISSN 1736-7530 online |
| #486 | Proceedings of the Institute of Radio Engineers. -- New York : Institute of Radio Engineers, 1913-1938. -- ISSN 0731-5996 print. -- ISSN 2162-6626 online |
| #487 | Proceedings of the Institution of Electrical Engineers, Part A, Power engineering. -- London : Institution of Electrical Engineers, 1955-1962. -- ISSN 0369-8882 print. -- ISSN 2054-040X online |
| #488 | Proceedings of the Institution of Electrical Engineers, Part B, Electronic and communication engineering, including radio engineering. -- London : Institution of Electrical Engineers, 1959-1962. -- ISSN 0369-8890 print. -- ISSN 2054-0418 online |
| #489 | Proceedings of the Institution of Electrical Engineers, Part C, Monographs. -- London : Institution of Electrical Engineers, 1955-1962. -- ISSN 0369-8904 print. -- ISSN 2054-0426 online |
| #490 | Proceedings of the National Academy of Sciences of the United States of America. -- Washington : National Academy of Sciences, 1914-. -- ISSN 0027-8424 print. -- ISSN 1091-6490 online |