Topical Subjects
- Coal mines and mining--Ohio--Downaton Point.1
- Coal mines and mining--Ohio--Georgetown.1
- Coal mines and mining--Pennsylvania--Exeter.1
- Coal mines and mining--Pennsylvania--Finleyville.1
- Coal mines and mining--Pennsylvania--Gray.1
- Coal mines and mining--Pennsylvania--Hazelton.1
- Coal mines and mining--Pennsylvania--Jenner.1
- Coal mines and mining--Pennsylvania--McIntyre.1
- Coal mines and mining--Pennsylvania--Somerset.1
- Coal mines and mining--Safety measures--Awards.1
- Coal mines and mining--Study and teaching.1
- Coal mines and mining--Tennessee--LaFollette.1
- Coal mines and mining--Virginia--Pocahontas.1
- Coal mines and mining--Waste disposal.1
- Coal mines and mining--West Virginia--Barricksville.1
- Coal mines and mining--West Virginia--Berwind.1
- Coal mines and mining--West Virginia--Besoco.1
- Coal mines and mining--West Virginia--Bishop.1
- Coal mines and mining--West Virginia--Bluefield.1
- Coal mines and mining--West Virginia--Brown.1