- Repository:
- West Virginia and Regional History Center
- Published:
- unknown
• | Coal mining - Mechanization. | (4) |
• | Coal mining - Labor organization. | (2) |
• | Coal mining -- Strikes | (2) |
• | Coal mining - Safety. | (1) |
• | Coal mining - Strip mining. | (1) |
• | Coal mining - coal companies. | (1) |
• | Coal mining. | (1) |
• | Engineering | (1) |
• | Farms and farming. | (1) |
• | Gas industry | (1) |