Topical Subjects
- Coal mines and mining--Ohio--Zanesville.4
- 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--Pennsylvania.5
- Coal mines and mining--Safety measures--Awards.1
- Coal mines and mining--Safety measures.78
- Coal mines and mining--Study and teaching.1
- Coal mines and mining--Tennessee--LaFollette.1
- Coal mines and mining--Virginia--Norton.4
- Coal mines and mining--Virginia--Pocahontas.1
- Coal mines and mining--Waste disposal.1
- Coal mines and mining--West Virginia--Amherstdale.2
- Coal mines and mining--West Virginia--Ansted.3
- Coal mines and mining--West Virginia--Barbour County.3
- Coal mines and mining--West Virginia--Barrackville.3