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

Author:	Paul, J. W.
Additional Authors:	Geyer, John Nicholas,
Year:	1933
Document Type:	USBM
Issuing Agency:	U.S.Bureau of Mines,
SUDOC:	C 22.5:547
Series:	Technical paper / United States. Bureau of Mines ;
Report Number:	547
Subjects:	Coal mine accidents
	Coal mines and mining--West Virginia
Link:	https://hdl.handle.net/2027/mdp.39015077565615