Subject
- Pilcher, Lewis Stephen, 1845-19341
- Poliomyelitis1
- Poupa, Otakar1
- Public Health Service (U.S.)1
- Public Relations.1
- Rato, Moreira1
- Riblett, Frances1
- Roberts, Paul1
- Rougier, Jacques1
- Sajfert, Milos1
- Schleich, Gustav1
- Schulze-Oben1
- Semans, Mary Duke Biddle Trent1
- Simon, Medgyes1
- Smet, Herman1
- Stead, Eugene A1
- Sternal, Stan1
- Stopfer, Hans1
- Strauss, Maurice J.1
- Stropus, G.1