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- Princeton University--Sports. (4)
- Printing industry. (2)
- Printing presses. (2)
- Prisons. (1)
- Progress photographs. (27)
- Progressive Party (1912)--Meetings. (1)
- Progressive Party (1912)--People. (1)
- Prohibition. (9)
- Publicity photographs. (2)
- Publishing industry. (1)
- Pueblos. (1)
- Puerto Rico--Culebra Island. (3)
- Puerto Rico--San Juan. (2)
- Puget Sound Naval Shipyard. (1)
- Purdue University--Buildings. (4)
- Purdue University--Facilities. (3)
- Purdue University--People. (4)
- Purdue University--Rites & ceremonies. (1)
- Purdue University--Sports. (4)
- Purdue University. (14)