| #241 | Praxis der Naturwissenschaften, Chemie in der Schule. -- Halbergmoos : Aulis Verlag in der Stark Verlagsgesellschaft, 2000-. -- ISSN 1617-5638 |
| #242 | Predškolská výchova. -- Bratislava : Slovenské pedagogické nakladateĺstvo, 1961-. -- ISSN 0032-7220 |
| #243 | Prospects. -- Paris : Unesco, 1969-. -- ISSN 0033-1538 print. -- ISSN 1573-9090 online |
| #244 | Quality assurance in education. -- Bingley : Emerald, 1993-. -- ISSN 0968-4883 print. -- ISSN 1758-7662 online |
| #245 | Reading & writing. -- Dordrecht : Kluwer Academic Publishers, 1989-. -- ISSN 0922-4777 print. -- ISSN 1573-0905 online |
| #246 | Reports of the Institute of High Speed Mechanics, Tohoku University. Series B, Technology. -- Japonsko : Tohoku Daigaku Kenkyujo hokoku. Kogaku - Soku-Ken, 1951-1989. -- ISSN 0370-5315 |
| #247 | Research in higher education. -- New York : Springer Science, 1973-. -- ISSN 0361-0365 print. -- ISSN 1573-188X online |
| #248 | Research in science education. -- Brisbane : Australian Science Education Research Association, 1971-. -- ISSN 0157-244X print. -- ISSN 1573-1898 online |
| #249 | Research news. -- Ann Arbor : University of Michigan, 1950-1973. -- ISSN 0041-9842 |
| #250 | Research strategies. -- Oxford : Pergamon Press, 1983-2005. -- ISSN 0734-3310 print. -- ISSN 1879-0666 online |