TY  - BOOK
AU  - Bieniawski, Z. T.
TI  - ENGINEERING ROCK MASS CLASSIFICATION
SN  - 0471601721
U1  - 624.15132 
PY  - 1989///
CY  - New York
PB  - Wiley
KW  - Geology, Economic
KW  - Rocks -- Classification
KW  - Rock Mechanics
ER  -