| #551 | Proceedings of the Bournemouth Natural Science Society. -- Bournemouth : Bournemouth Natural Science Society, 1922-. -- ISSN 0962-5364 |
| #552 | Proceedings of the Indian National Scientific Academy, Pt. A. Physical sciences. -- New Delhi : Indian National Sceince Academy, 1970-. -- ISSN 0370-0046 |
| #553 | Proceedings of the Indiana Academy of Science. -- Indianapolis : Indiana Acad. of Science, 1891-. -- ISSN 0073-6767 |
| #554 | Proceedings of the Iowa Academy of Science. -- Des moines : Iowa Academy of Science, 1889-1987. -- ISSN 0085-2236 |
| #555 | Proceedings of the Japan Academy, Series B, Physical and biological sciences. -- Tokyo : Japan Academy, 1977-. -- ISSN 0386-2208 |
| #556 | Proceedings of the Journal the Utah Academy of Sciences, Arts and Letters. -- : Utah Academy of Sciences, Arts, and Letters, 1977-1997. -- ISSN 0196-9110 |
| #557 | Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Series B, Palaeontology, geology, physics, chemistry, anthropology. -- Amsterdam : North-Holland, 1983-1989. -- ISSN 0920-2250 |
| #558 | Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. -- Amsterdam : North-Holland, 1990-1997. -- ISSN 0924-8323 |
| #559 | Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Series B, Palaeontology, geology, physics and chemistry. -- Amsterdam : North-Holland, 1976-1983. -- ISSN 0023-3366 |
| #560 | Proceedings of the National Science Council, Republic of China, Part D, Mathematics, science and technology education. -- Taipei : National Science Council, 1991-. -- ISSN 1017-7124 |