Subjects
- Cannel coal -- Coal mines and mining1
- Coal miners1
- Coal miners--West Virginia1
- Coal mines and mining -- Kentucky[remove]3
- Coal mining - Labor organization.1
- Coal mining - coal companies.1
- Coal mining -- Strikes1
- Coal mining.3
- Geology1
- Kentucky - railroads.1
- Petroleum industry and trade1
- Railroads1
- Railroads -- Kentucky1
- Union names.1
- Unions - National Miners Union.1