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

Bibliographic Details

Main Author:	McCulloch, C. M. (Charles M.)
Corporate Author:	United States. Bureau of Mines
Other Authors:	Deul, Maurice
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, [1973]
Series:	Report of investigations (United States. Bureau of Mines) ; 7769.
Subjects:	Mine roof control.
Online Access:	https://purl.fdlp.gov/GPO/LPS97410