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Subject
- Mines and mineral resources.[remove]5
- Coal miners--Illinois.1
- Coal mines and mining--Illinois.1
- Coalfields.1
- Coolidge, Calvin, 1872-1933.1
- Coolidge, Grace Goodhue, 1879-1957.1
- Daniels, Josephus, 1862-1948.1
- Hibbing (Minn.)--Description and travel.1
- Iron industry.1
- Landscapes.1
- Logging, Skyline.1
- Magnesium industry and trade.1
- Middle West--Description and travel.1
- Mineral industries.1
- Motion picture journalism--United States--History.1
- Motion picture journalists--United States--History.1
- Mountains.1
- Railroad.1
- Strikes and lockouts--Coal mining--Illinois.1
- Tin industry.1