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

Main Author: McCulloch, C. M.
Other Authors: Deul, Maurice., United States. Bureau of Mines.
Format: Book
Language: English
Published: [Washington, D.C.] : U.S. Dept. of Interior, Bureau of Mines, 1973.
Physical Description: 25 pages : illustrations, maps ; 26 cm.
Series: Report of investigations (United States. Bureau of Mines) ; 7769.

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