Subjects
- Account books1
- Coal - Mine safety.1
- Coal miners - Medical care.1
- Coal mining - Labor organization.2
- Coal mining - Medical care.1
- Coal mining - Safety.1
- Coal mining - Working conditions.[remove]3
- Coal mining - coal operators associations.1
- Coal mining - company stores.1
- Coal mining - disasters.1
- Coal mining -- Strikes2
- Labor organization. SEE ALSO Coal mining - labor1
- Railroads1
- Rivers and river valleys.1
- Roads. SEE ALSO Turnpikes.1