TY  - BOOK
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 & Sons
KW  - Geology, Economic
KW  - Rocks
KW  - Classification
KW  - Rock mechanics
N1  - 'A Wiley-Interscience publication.'; Includes index
ER  -