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Topical Subjects
- Coal Mines and Mining--Consolidation Coal Company.[remove]42
- Coal miners.19
- Coal mines and mining.[remove]42
- Coal--Geology.3
- Coal--Transportation.11
- Coal-mining machinery.6
- Coal.1
- Conveying machinery.1
- Core drilling.1
- Freight cars.7
- Loading and unloading.1
- Mine railroads--Cars.1
- Mine railroads.2
- Power shovels.9
- Shuttle cars (Mine haulage)3
- Tiger (Power shovel)2
- Tipples.6