- PAGEPRESS PUBL3
- PAKISTAN AGRICULTURAL SCIENTISTS FORUM3
- Pakistan Agricultural Scientists Forum1
- Pakistan Botanical Society3
- PALGRAVE MACMILLAN LTD2
- Palgrave Macmillan1
- PAMUKKALE UNIV12
- Pamukkale University4
- PAN-EUROPEAN UNIV APEIRON2
- PARLAR SCIENTIFIC PUBLICATIONS (P S P)13
- Parlar Scientific Publications7
- PeerJ Inc.2
- Penerbit Universiti Kebangsaan Malaysia2
- Pensoft Publishers2
- PERGAMON-ELSEVIER SCIENCE LTD52
- Perkin - Elmer Corp.2
- Peter Lang AG59
- Peter Lang Publishing Group11
- Pfeil Verlag2
- PiscoMed Publishing2
- Plapiqui2
- Pleiades journals2
- Pleiades Publishing13
- POLISH ACAD SCIENCES INST PHYSICS1
- Polish Academy of Sciences5
- Polish Academy Sciences. Institute of Animal Reproduction and Food Research2
- Polska Akademia Nauk2
- POLSKA AKAD NAUK, POLISH ACAD SCIENCES2
- POLSKIE TOWARZYSTWO PSYCHIATRYCZNE-POLISH SOC PSYCHIATRY1
- Ponorogo State Institute Of Islamic Religion2
- Pontificia Universidad Catolica de Chile, Escuela de Construccion Civil2
- Pontificia Universidade Catolica do Parana2
- Prague University of Economics and Business2
- Procema SA1
- PROFESSIONAL MEDICAL PUBLICATIONS1
- Professional Medical Publications3
- PT. Islamic Research Publisher2
- PUBL HOUSE BULGARIAN ACAD SCI1
- PUBLIC LIBRARY SCIENCE3
- PUBLISAUDE-EDICOES MEDICAS LDA2
- Public Library of Science4
- Publishing House of the Romanian Academy2
- Pulp and Paper Research Institute2
