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Topical Subjects
- Coal preparation plants.4
- Coal mines and mining--Illinois--Nokomis.2
- Coal mines and mining.2
- Coal preparation plants--Illinois--Nokomis.2
- Coal mines and mining--Illinois--Benton.1
- Coal preparation plants--Illinois--Benton.1
- Coal--Transportation.1
- Conveying machinery.1
- Counties--McDowell.1
- Factories--Pennsylvania--Crozer.1
- Freight cars.1
- Railroad tracks--Pennsylvania--Crozer.1
- Scientific apparatus and instruments.1