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Production of explosives in the United States during the calendar year 1930

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.

Production of explosives in the United States :during the calendar year 1931

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

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

Published Year

• 1930-1939 (6) *

Subject

• Coal mine accidents (6) *
• Coal mines and mining--West Virginia (2)
• Coal mines and mining--West Virginia--Monongalia County (2)
• Explosives (2)
• Coal mines and mining--West Virginia--Marion County (1)

Author

• Geyer, John Nicholas, (4)
• Paul, J. W. (4)
• Adams, William W. (2)
• Gerry, L. S. (2)

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