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Falls of roof and coal in mines operating in the Pittsburgh coal bed in Marion and Monongalia counties, W. Va.

Falls of roof and coal in mines operating in the Sewickley coal bed in Monongalia County, W. Va.

Falls of roof and coal in mines operating in the Pittsburgh Coal Bed, Panhandle District, West Virginia

Blasting practices as they affect the roof of coal mines in Ohio, Pennsylvania, and West Virginia

Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia

Published Year

• 1930-1939 (5) *

Subject

• Coal mine accidents (4)
• Coal mines and mining--West Virginia (2)
• Coal mines and mining--West Virginia--Monongalia County (2)
• Blasting--Safety measures (1)
• Coal mines and mining--Safety measures (1)
• Coal mines and mining--West Virginia--Marion County (1)

Author

• Geyer, John Nicholas, (5) *
• Paul, J. W. (4)

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