Geologic factors causing roof instability and methane emission problems :the Lower Kittanning coalbed, Cambria County, Pa.

Author:	McCulloch, C. M.
Additional Authors:	Deul, Maurice.
Year:	1973
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Interior, Bureau of Mines,
SUDOC:	I 28.23:7769
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	7769
Subjects:	Mine roof control
	Firedamp
	Coal mines and mining--Pennsylvania--Cambria County
Link:	https://hdl.handle.net/2027/mdp.39015078521070