Topical Subjects
- Coal mines and mining--West Virginia.2
- Coal mines and mining.3
- Coal preparation plants--Kentucky--Jenkins.1
- Coal preparation plants--Ohio--Cadiz.2
- Coal preparation plants--West Virginia--Fairmont.2
- Coal preparation plants--West Virginia.1
- Coal preparation plants.6
- Coal preparation.4
- Coal trade--Accidents.1
- Coal trade--Exhibitions.1
- Coal washing.3
- Coal--Awards.1
- Coal--Exhibitions.11
- Coal--Storage.1
- Coal--Transportation--West Virginia--Fairmont.1
- Coal--Transportation--West Virginia.6
- Coal--Transportation.5
- Coal-mining machinery.2
- Coal.3
- Conveying machinery.1