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Topical Subjects
- Coal Mines and Mining--Mine Entrances.3
- Coal Mines and Mining--Consolidation Coal Company.2
- Coal mines and mining.2
- Coal preparation plants--West Virginia--Owings.2
- Mine railroads.2
- Coal Mines and Mining--Mine Facilities.1
- Coal Mines and Mining--Mine Interiors.1
- Coal Mines and Mining--Preparation Plant Exteriors.1
- Coal miners--West Virginia.1
- Coal miners.1
- Coal mines and mining--West Virginia--Owings.1
- Coal--Transportation--West Virginia--Owings.1
- Coal--Transportation--West Virginia.1
- Coal--Transportation.1
- Coal-mining machinery.1
- Electric locomotives.1
- Mine gases--Measurement.1