| #321 | Optics communications. -- Amsterdam : North-Holland, 1969-. -- ISSN 0030-4018 print. -- ISSN 1873-0310 online |
| #322 | Parabola satelit. -- Praha : Print Media, 1993-2006. -- ISSN 1210-4434 |
| #323 | Periodica polytechnica, Electrical engineering. -- Budapest : Technical University, 1957-. -- ISSN 0324-6000 |
| #324 | Photovoltaics bulletin. -- Oxford : Elsevier Advanced Technology, 2001-. -- ISSN 1473-8325 print. -- ISSN 1878-1357 online |
| #325 | Physica, B + C. -- Amsterdam : North-Holland, 1975-1988. -- ISSN 0378-4363 print. -- ISSN 1873-2127 online |
| #326 | Pictures of the future : The magazine for research and innovation, Firemní časopis [anglická verze]. -- München : Siemens, 2001-. -- ISSN 1618-5498 |
| #327 | Pictures of the future : Die Zeitschrift für Forschung und Innovation, Firemní časopis [německá verze]. -- München : Siemens, 2001-. -- ISSN 1618-548X |
| #328 | Plant & control engineering. -- Tonbridge : IML Group, 1983-. -- ISSN 1468-344X |
| #329 | Power engineer. -- Stevenage : Institution of Electrical Engineers, 2003-. -- ISSN 1479-8344 |
| #330 | Power engineering journal. -- Stevenage : Institution of Electrical Engineers, 1987-2002. -- ISSN 0950-3366 |