TY  - BOOK
AU  - Singh,Bhawani
AU  - Goel,R.K.
TI  - Rock mass classification: a practical approach in civil engineering 
SN  - 80430139
PY  - 1999///
CY  - Amsterdam
PB  - Elsevier
KW  - Engineering geology
KW  - Rocks
KW  - Classification
N1  - Includes bibliographical  references and indexes
ER  -