TY  - GEN
AU  - Tandanand,Sathit
ED  - United States.
TI  - Development of a mechanical roof breaker for ground control in longwall operations under massive roof
T2  - Report of investigations
PY  - 1979///
CY  - Washington
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Ground control (Mining)
KW  - Rock mechanics
ER  -