Subjects
- Pennsylvania Glass Sand Corporation - Glass Sand Industry.1
- Petroleum industry and trade1
- Photography2
- Poetry -- Nannie S. Castleman1
- Political campaigns1
- Political factions - Civil War.1
- Politicians1
- Politicians -- United States2
- Politics - Secession of Virginia.1
- Politics and government.8
- Printers and printing.2
- Propaganda, Soviet1
- Public utilities industry.1
- Publishers and publishing1