TY  - GEN
AU  - Bieniawski, Z.T.
TI  - Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering
SN  - 0471601721
PY  - 1989///
CY  - New York
PB  - John Wiley
KW  - CIVIL ENGINEERING
KW  - ENGINEERING GEOLOGY
KW  - ROCK DRILLING
ER  -