- Pacific Fishery Management Council (U.S.)1
- Pacific Institute1
- Paskevich, Valerie1
- Patuxent Wildlife Research Center1
- Pepper, W., active 18581
- Perkins Sun Lithographic Establishment1
- Pierce Meyer, Katie1
- Pisani, Almorò Alvise, 1754-18081
- Placer County (Calif.). Community Development Resource Agency1
- Placer County Community Development Resource Agency-Geographic Information Systems Division1
- Popple, Henry1
- Pownall, Thomas1
- Ptolemy, Claudius1
- Rand McNally and Company1
- Rapkin, J.1
- Rebecca Flores Miller1
- Resources Legacy Fund Foundation1
- Richardson, Andy1
- Richardson, William A., 1795-18561
- Ritters, Kurt1
