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Topical Subjects
- Coal Mines and Mining--Miners at Work.[remove]77
- Coal miners.63
- Coal mines and mining.60
- Coal-mining machinery.22
- Loaders (Machines)9
- Shuttle cars (Mine haulage)8
- Mine gases--Measurement.6
- Boring.5
- Mine roof bolting.5
- Coal mines and mining--Explosives.4
- Mine railroads.4
- Coal miners--Kentucky.2
- Coal mines and mining--Kentucky.2
- Coal mines and mining--Safety measures.2
- Coal mines and mining--West Virginia.2
- Adena culture--Ohio.1
- Coal miners--West Virginia--Owings.1
- Coal miners--West Virginia--Pursglove.1
- Coal miners--West Virginia--Shinnston.1
- Coal miners--West Virginia.1