TY  - BOOK
AU  - Johnson, Robert.B
AU  -  Degraff, Jerome V
TI  - Priniciples of engineering geology
SN  - 9788126533145
U1  - 624.151/JOH/P 
PY  - 2013///
CY  - New Delhi
PB  - Wiley
KW  - Engineering geology
ER  -