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Topical Subjects
- Coal miners.[remove]353
- Coal mines and mining.198
- Coal Mines and Mining--Miners at Work.106
- Coal-mining machinery.75
- Coal Mines and Mining--Consolidation Coal Company.47
- Coal Mines and Mining--Pocahontas Operators Association.29
- Coal Mines and Mining--Mine Interiors--Machinery.25
- Mine railroads.25
- Loaders (Machines)19
- Shuttle cars (Mine haulage)18
- Coal Mines and Mining.17
- Coal Mines and Mining--Mine Interiors.16
- Coal mines and mining--Equipment and supplies.15
- Coal Mines and Mining--Strikes--Bittner Collection.14
- Coal Mines and Mining--Coal Carts.12
- Coal Mines and Mining--Miners and Miners' Families' Daily Lives.12
- Coal Mines and Mining--Portraits--Group.12
- Children of coal miners.11
- Coal mines and mining--Safety measures.11
- Mine roof bolting.11