Subjects
- Coal mining.[remove]34
- Coal mining - coal companies.10
- Politics and government.10
- Account books9
- Maps.7
- Coal mining - coal operators associations.6
- Coal mining -- Strikes6
- Elections6
- Lawyers - letters and papers.6
- Coal mining - Labor organization.5
- Coal mining - Safety.5
- Railroads5
- Lumber trade4
- New Deal, 1933-19394
- Petroleum industry and trade4