Subjects
- Coal - Logan County.1
- Coal - Mine safety.1
- Coal - company stores.1
- Coal - labor disputes.[remove]2
- Coal - labor relations.1
- Coal - problems.1
- Coal miners' trials.1
- Coal mining - Safety.1
- Coal mining - coal operators associations.1
- Coal mining -- Strikes1
- Coal mining.1
- Diaries and journals.1
- Labor1
- Labor disputes1
- Labor organization.1