Cutter roof failure : six case studies in the Northern Appalachian Coal Basin /
Bauer, Eric R.
Cutter roof failure : six case studies in the Northern Appalachian Coal Basin / by Eric R. Bauer. - [Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, [1990] - 18 p. : ill., map - Information circular ; 9266 . - Information circular (United States. Bureau of Mines) ; 9266. .
90002267
Mine roof control.
Coal mines and mining--Appalachian Region.
Cutter roof failure : six case studies in the Northern Appalachian Coal Basin / by Eric R. Bauer. - [Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, [1990] - 18 p. : ill., map - Information circular ; 9266 . - Information circular (United States. Bureau of Mines) ; 9266. .
90002267
Mine roof control.
Coal mines and mining--Appalachian Region.