| #181 | Polar science. -- Oxford : Elsevier Science, 2007-. -- ISSN 1873-9652 print. -- ISSN 1876-4428 online |
| #182 | Postępy astronomii. -- Warszawa : Polskie Towarzystwo Astronomiczne, 1953-1997. -- ISSN 0032-5414 |
| #183 | Pramana. -- Bangalore : Indian Academy of Sciences, 1973-. -- ISSN 0304-4289 print. -- ISSN 0973-7111 online |
| #184 | Proceedings of the International Astronomical Union. -- Cambridge : Cambridge University, 2004-. -- ISSN 1743-9213 print. -- ISSN 1743-9221 online |
| #185 | Publications of the Astronomical Society of Australia. -- Collingwood, Vic. : CSIRO Publishing, 1995-. -- ISSN 1323-3580 print. -- ISSN 1448-6083 online |
| #186 | Publications of the Astronomical Society of the Pacific. -- Bristol : Institute of Physics, 1889-. -- ISSN 0004-6280 print. -- ISSN 1538-3873 online |
| #187 | QST : devoted entirely to Amateur Radio. -- Newington : The American Radio Relay Leaque, 1915-. -- ISSN 0033-4812 |
| #188 | Quaternary geochronology. -- Amsterdam : Elsevier Science, 2006-. -- ISSN 1871-1014 print. -- ISSN 1878-0350 online |
| #189 | Radiation measurements. -- Oxford : Pergamon Press, 1994-. -- ISSN 1350-4487 print. -- ISSN 1879-0925 online |
| #190 | Radiation physics and chemistry. -- Oxford : Pergamon, 1993-. -- ISSN 0969-806X print. -- ISSN 1879-0895 online |