Subjects
- Coal mining - Illinois.1
- Coal mining - Labor organization.1
- Coal mining.1
- Grievance cases - labor unions.1
- Illinois - Coal mining.1
- Labor unions - grievance cases.1
- Labor unions - pension plans.1
- Pension plans - labor unions.1
- Union names.1
- Unions - Progressive Mine Workers of America.1
- Unions -- Coal1
- Unions. SEE ALSO Labor organization.1
- United States Bureau of Mines - Inspectors' reports.1