Subjects
- Coal - problems.1
- Coal Mining - Tug River field1
- Coal industry.1
- Coal miners1
- Coal miners--West Virginia1
- Coal mines and mining -- Kentucky1
- Coal mining - Illinois.1
- Coal mining - Labor organization.5
- Coal mining - March on Mingo and Logan.1
- Coal mining - Medical care.1
- Coal mining - New River field.1
- Coal mining - Regulation.1
- Coal mining - Safety.2
- Coal mining - Strip mining.1
- Coal mining - Winding Gulf field.1