TY  - BOOK
AU  - Tandanand,Sathit
TI  - Development of a mechanical roof breaker for ground control in longwall operations under massive roof
T2  - Report of investigations - United States Department of the Interior, Bureau of mines
AV  - TN23TN288 .U43 no. 8416
U1  - 622/.08 s622/.26 
PY  - 1979///
CY  - Washington
PB  - Dept. of the Interior, Bureau of Mines
KW  - Ground control (Mining)
KW  - Local
KW  - Rock mechanics
N1  - Bibliography: p. 17-18
ER  -