Falls of roof and coal in mines operating in the Sewickley coal bed in Monongalia County, W. Va.
By: by J.W. Paul and J.N. Geyer.
Contributors: Geyer, John Nicholas, 1896-
Series: U.S. Bureau of Mines. Technical paper; 520
Publisher: U.S. Govt. Print. Off.
Published: 1932
Place of publication: Washington
Language: eng
Number of pages: 31
Subjects: Coal mine accidents.; Coal mines and mining -- West Virginia -- Monongalia County.
Notes: At head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, director ...
Running title: Falls of roof and coal in Sewickley bed, W. Va.