TY  - GEN
AU  - Bauer,Eric R.
TI  - Cutter roof failure: six case studies in the Northern Appalachian Coal Basin 
T2  - Information circular
PY  - 1990///]
CY  - [Washington, D.C.]
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Mine roof control
KW  - Coal mines and mining
KW  - Appalachian Region
ER  -