Subjects
- Account books1
- Broadsides.1
- Coal - Logan County.1
- Coal - Mine safety.2
- Coal - company stores.1
- Coal - labor disputes.1
- Coal - labor relations.1
- Coal - problems.1
- Coal mine accidents1
- Coal miners - Medical care.1
- Coal mines and mining -- Safety measures1
- Coal mines and mining -- Safety regulations1
- Coal mining - Labor organization.1
- Coal mining - Medical care.1
- Coal mining - Safety.[remove]5