| #491 | Proceedings of the Fujihara Memorial Faculty of Engineering Keio University. -- Japonsko : Tokyo : vl. n., 1950-1970 |
| #492 | Proceedings of the Imperial Academy. -- Japonsko : Tokyo : Imperial Academy of Japan, 1912-1945. -- ISSN 0369-9846 |
| #493 | Proceedings of the IREE Australia. -- Australie : Sydney : Institution of Radio and Electronics Engineers Australia, 1979-1980 |
| #494 | Process engineering, plant and control. -- Velká Británie : London : Product Journal Ltd.,, 1965-1972. -- ISSN 0032-9606 |
| #495 | Process instrumentation. -- Velká Británie : London : United Trade Press, 1972 |
| #496 | Produce Packaging. -- Velká Británie : London : Produce Prepackaging Development Assoc., 1959 |
| #497 | Product Data. -- Velká Británie : London : Heywood-Temple Industrial Publ.,, 1965-1968 |
| #498 | Product design & development. -- Spojené státy americké : Philadelphia : Chilton Publ.,, 1946-1968. -- ISSN 1084-7278 |
| #499 | Product finishing handbook & directory. -- Redhill : FMJ International Publ., 1996-. -- ISSN 1362-3680 |
| #500 | Profil : das unabhängige Nachrichtenmagazin Österreichs. -- Wien : Trend-Verlagstechnik, 1970-. -- ISSN 1022-2111 |