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Topical Subjects
- Coal preparation plants.3
- Coal Mines and Mining--Coal Transportation--Facilities.2
- Coal Mines and Mining--Pocahontas Operators Association.2
- Coal Mines and Mining--Preparation Plant Exteriors.2
- Coal-carrying vessels.2
- Coal Mines and Mining--Consolidation Coal Company.1
- Coal Mines and Mining--Laboratories.1
- Coal Mines and Mining--Preparation Plant Interiors.1
- Coal preparation plants--West Virginia--Itmann.1
- Coal preparation plants--West Virginia.1
- Coal trade--West Virginia--Itmann.1
- Coal trade.1
- Coal--Testing.1
- Post office buildings.1
- Research, Industrial--Laboratories.1