| #2261 | Proceedings of the Royal Irish Academy, Section B, Biological, geological, and chemical science. -- Dublin : Royal Irish Academy, 1902-1992. -- ISSN 0035-8983 |
| #2262 | Proceedings of the Royal Irish Academy, Section A, Mathematical and physical sciences. -- Dublin : Royal Irish Academy, 1902-1997. -- ISSN 0035-8975 |
| #2263 | Proceedings of the Royal Irish Academy, Section C, Archaeology, Celtic studies, history, linguistics and literature. -- Dublin : Royal Irish Academy, 1969-. -- ISSN 0035-8991 |
| #2264 | Proceedings of the Royal Society of Edinburgh, Sect. B. -- Edinburgh : Royal Society of Edinburgh, 1975. -- ISSN 0308-2113 |
| #2265 | Proceedings of the Royal Society of London, Series A, Mathematical and physical sciences. -- London : Royal Society, 1934-1990. -- ISSN 0080-4630 |
| #2266 | Proceedings of the Royal Society of London, Series B, Biological Sciences. -- London : Royal Society, 1934-1990. -- ISSN 0080-4649 |
| #2267 | Proceedings of the Royal Society of New Zealand. -- Wellington : High Commissioner for New Zealand, 1958-. -- ISSN 0557-4161 |
| #2268 | Proceedings of the Royal Society of Queensland. -- Brisbane : Univ. of Queensland Press, 1884-. -- ISSN 0080-469X |
| #2269 | Proceedings of the West Virginia Academy of Sciences. -- Morgantown : West Virginia Academy of Sciences, 1924-. -- ISSN 0096-4263 |
| #2270 | Proceedings - Royal Microscopical Society. -- Oxford : Blackwell Scientific Publications, 1966-2005. -- ISSN 0035-9017 |