Places of occurrence of injury from falls of roof

Author:	Paul, J. W.
Additional Authors:	Sibray, D. L.
Year:	1933
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.12:3203
Series:	Report of investigations / United States Department of Commerce, Bureau of Mines ;
Report Number:	3203
Subjects:	Mine roof control
	Mine accidents
Link:	https://hdl.handle.net/2027/mdp.39015077563271