| #851 | Planner : journal of the Royal Town Planning Institute. -- : Royal Town Planning Institute, 1973-1993. -- ISSN 0309-1384 |
| #852 | PlanningWeek : the journal of the Royal Town Planning Institute. -- Teddington : Haymarket Trade and Leisure Magazines, 1993-1997. -- ISSN 1352-8424 |
| #853 | Pliska : studia mathematica Bulgarica. -- Sofiâ : Bulgarska akademiâ na naukite, 1977-. -- ISSN 0204-9805 |
| #854 | Pokroky matematiky, fyziky a astronomie. -- Praha : Jednota českých matematiků a fyziků, 1956-. -- ISSN 0032-2423 |
| #855 | Portugaliae mathematica. -- Lisboa : Sociedade Portuguesa de Matematica, 1937-. -- ISSN 0032-5155 print. -- ISSN 1662-2758 online |
| #856 | Positivity. -- Dordrecht : Kluwer Academic Publishers, 1997-. -- ISSN 1385-1292 print. -- ISSN 1572-9281 online |
| #857 | Potential analysis : An International journal devoted to the interactions between potential theory, probability theory, geometry a. funct.an. -- Dordrecht : Kluwer Academic Publishers, 1992-. -- ISSN 0926-2601 print. -- ISSN 1572-929X online |
| #858 | The Prague Bulletin of Mathematical Linguistics. -- Praha : Charles University, 1964-. -- ISSN 0032-6585 |
| #859 | Praxis der Mathematik in der Schule. -- Berlin : Pädagogische Zeitschriftverlag, 2001-. -- ISSN 1617-6960 |
| #860 | Prikladnaâ matematika i mehanika. -- Moskva : Nauka, 1936-. -- ISSN 0032-8235 |