Cutter roof failure :six case studies in the Northern Appalachian Coal Basin

Author:	Bauer, Eric R.
Year:	1990
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:9266
Series:	Information circular / Bureau of Mines ;
Report Number:	9266
Subjects:	Mine roof control
	Coal mines and mining--Appalachian Region
Link:	https://hdl.handle.net/2027/mdp.39015078458174