TY  - GEN
AU  - Gertsch, Richard E.
AU  -  Bullock,Richard L.
TI  - Techniques in underground mining : : selections from underground mining methods handbook
SN  - 9780873351638
PY  - 1998///
CY  - Littleton
PB  - Society for Mining Metallurgy and Exploration
KW  - MINING ENGINEERING
KW  - METALLURGY
KW  - MINING EXPLORATION
N1  - References, Bibliography, Index included
ER  -