Subjects
- Coal - Logan County.1
- Coal - Mine safety.[remove]2
- Coal - company stores.1
- Coal - labor disputes.1
- Coal - labor relations.1
- Coal - problems.1
- Coal miners - Medical care.1
- Coal mining - Labor organization.1
- Coal mining - Medical care.1
- Coal mining - Safety.2
- Coal mining - Working conditions.1
- Coal mining - coal operators associations.1
- Coal mining.1
- Diaries and journals.1
- Logan County - coal.1