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Topical Subjects
- Power shovels.67
- Coal Mines and Mining--Portraits--Group.63
- Coal mines and mining.59
- Strip mining.51
- Coal Mines and Mining--Consolidation Coal Company.12
- Coal trade.7
- Coal preparation plants.6
- Coal Mines and Mining--Preparation Plant Exteriors.5
- Coal Mines and Mining--Surface Mining.5
- Tiger (Power shovel)5
- Coal Mines and Mining--Coal Transportation--Facilities.2
- Ambulances.1
- Coal Mines and Mining--Mine Facilities.1
- Coal Mines and Mining--Miners and Miners' Families' Daily Lives.1
- Coal miners--Education.1
- Coal miners.1
- Coal mines and mining--Ohio--Cadiz.1
- Coal mines and mining--Ohio--Georgetown.1
- Coal mines and mining--Safety measures.1
- Coal preparation plants--Ohio--Cadiz.1