A study of falls of roof and coal in mines of Harrison County, West Virginia

Author:	Paul, J. W.
Additional Authors:	Geyer, J. N.
Year:	1931
Document Type:	BMRA
Issuing Agency:	United States Bureau of Mines,
SUDOC:	C 22.12:3110
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3110
Subjects:	Coal mines and mining
	Mine timbering
Link:	https://hdl.handle.net/2027/mdp.39015077567132