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Topical Subjects
- Coal mines and mining--West Virginia--Thomas.116
- Coal mines and mining.57
- Coal Mines and Mining--Coal Transportation--Rail.53
- Coal Mines and Mining--Headframes.51
- Headframes (Mining)49
- Coal--Transportation.40
- Freight cars.39
- Cities--Thomas.37
- Coal Mines and Mining--Mine Safety.37
- Coal mines and mining--Safety measures.37
- Mine safety.30
- Coal Mines and Mining--Mine Interiors--Machinery.27
- Coal-mining machinery.26
- Coal mines and mining--Equipment and supplies.23
- Coal Mines and Mining.22
- Coal Mines and Mining--Mine Facilities.21
- Coal Mines and Mining--Tipples.21
- Dwellings--West Virginia--Thomas.20
- Tipples--West Virginia--Thomas.17
- Conveying machinery.16