Subjects
- Coal mining - March on Mingo and Logan.1
- Coal mining - Mechanization.2
- Coal mining - Medical care.2
- Coal mining - Miners' March of 1919.2
- Coal mining - Miners' Treason Trials.3
- Coal mining - Safety.2
- Coal mining - Scrip.1
- Coal mining - Strikes - Colorado mines.1
- Coal mining - Strikes - West Virginia mines.2
- Coal mining - Strip mining.1
- Coal mining - West Virginia Coal Association.1
- Coal mining - Working conditions.2
- Coal mining - camps and company towns.2
- Coal mining - coal companies.2
- Coal mining - coal operators associations.2