TY  - GEN
AU  - Schmidt,R.L.
ED  - United States.
TI  - Application of large-hole burn cut in room-and-pillar mining
T2  - Report of investigations
PY  - 1975///
CY  - [Washington]
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Blasting
KW  - Mining engineering
ER  -