Subjects
- New Deal, 1933-19391
- Occupational safety and health - Vinyl chloride.1
- Petroleum industry and trade1
- Physicians - letters and papers.1
- Politicians -- United States1
- Politics and government.2
- Public health1
- Railroad workers.1
- Railroads1
- Rivers and river valleys.1
- Schools1
- Southern Soil Conservation District.1
- Union names.1
- Unions - International Association of Machinists.1
- Unions - Local 598, IAM.1