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Topical Subjects
- Coal Mines and Mining--Coal Displays.[remove]56
- Coal mines and mining--Equipment and supplies.14
- Mining machinery.12
- Coal--Exhibitions.10
- Coal-mining machinery.10
- Coal.9
- Smokeless fuel--Exhibitions.9
- Advertising.4
- Smokeless fuel.4
- Billboards.3
- Coal preparation plants--Ohio--Cadiz.2
- Shuttle cars (Mine haulage)2
- Coal mines and mining--Exhibitions.1
- Coal mines and mining--West Virginia--Pocahontas--Maps.1
- Coal preparation plants--West Virginia.1
- Coal trade--Exhibitions.1
- Coal--Awards.1
- Industries--Exhibitions.1
- Mine roof bolting.1
- Steel--Exhibitions.1