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Topical Subjects
- Coal mines and mining--Virginia--Pocahontas.1
- Coal mines and mining--West Virginia--Barrickville.1
- Coal mines and mining--West Virginia--Elkhorn.1
- Coal mines and mining--West Virginia--Owings.1
- Coal mines and mining--West Virginia--Preston County.1
- Coal mines and mining--West Virginia--Pursglove.1
- Coal mines and mining--West Virginia--Watson.1
- Coal--Transportation.1
- Coal-handling machinery.1
- Electricity in mining.1
- Industrial equipment.1
- Machine shops.1
- Mine railroads--Cars.1
- Mine railroads.1
- Mine timbering.1
- Roof trusses.1