- Patuxent Wildlife Research Center1
- Paz Soldan, Mariano Felipe, 1821-18862
- Pedersen, Richard J., 1952-2
- Pedrosa, Maria Teresa2
- Pepper, W., active 18581
- Perkins Sun Lithographic Establishment1
- Phillips, Eleyne L.61
- Pierce Meyer, Katie1
- Pinkerton, John, 1758-18263
- Pisani, Almorò Alvise, 1754-18081
- Placer County5
- Placer County (Calif.) -- Community Development Resource Agency4
- Placer County (Calif.). Community Development Resource Agency1
- Placer County Community Development Resource Agency-Geographic Information Systems Division1
- Placer County Geographic Information Systems33
- Popple, Henry1
- Portugal. Direcção Geral de Ordenamento do Território9
- Powell, Susan46
- Pownall, Thomas1
- Pribyl, Cindy2
