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Topical Subjects
- Coal Mines and Mining--Consolidation Coal Company.[remove]100
- Coal miners.37
- Coal mines and mining.26
- Coal-mining machinery.26
- Coal mines and mining--Equipment and supplies.18
- Power shovels.16
- Coal--Transportation.8
- Freight cars.6
- Shuttle cars (Mine haulage)5
- Strip mining.5
- Loaders (Machines)4
- Coal preparation plants--Equipment and supplies.3
- Coal preparation plants.3
- Coal--Geology.3
- Coal.3
- Mine roof bolting.3
- Mining machinery.3
- Automobiles.2
- Coal mines and mining--Explosives.2
- Coal mines and mining--Kentucky.2