Organizations
- Pakistan Journal of Botany Publisher
- Pontificia Universidade Catolica de Sao Paulo - (São Paulo, Brazil) External Organization
- Pontifical Catholic University of Rio de Janeiro - (Rio de Janeiro, Brazil) External Organization
- Paul H Brookes Publishing Publisher
- Psychiatry Bryan College Station Campus Academic Department,Organization
- Polytechnic University of Bucharest - (Bucharest, Romania) External Organization
- Pusan National University - (Busan, South Korea) External Organization
- Physical Review C - Nuclear Physics Publisher
- Polytechnic of Medimurje in Cakovec - (Čakovec, Croatia) External Organization
- Pomona College - (Claremont, California, United States) External Organization
- Pepperdine University - (Malibu, California, United States) External Organization
- Pitzer College - (Claremont, California, United States) External Organization
- Point Loma Nazarene University - (San Diego, California, United States) External Organization
- Petroleum Society of Canada Publisher
- Pan Health Care Research Society Publisher
- Pontifical Catholic University of Chile - (Santiago, Region Metropolitana de Santiago, Chile) Organization,External Organization
- Pontifical Catholic University of Peru - (Lima, Peru) External Organization
- Pontificia Universidad Catlica del Per Publisher
- Pontificia Universidad Católica del Perú Publisher
- Philosophy Documentation Center Publisher
- Polymer Technology Center Center,Organization
- Process Engineering R&D Center Center,Organization