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Topical Subjects
- Coal Mines and Mining.23
- Coal mines and mining.22
- Coal--Transportation.3
- Freight cars.3
- Tipples.3
- Coal miners--Dwellings.2
- Conveying machinery.2
- Tipples--Design and construction.2
- Bridges.1
- Coal Mines and Mining--Tipples.1
- Coal mines and mining--Kentucky.1
- Coal preparation plants.1
- Mine inspection.1
- Mine railroad cars.1
- Mine railroads.1
- Tipples--Kentucky.1