TY  - BOOK
AU  - Johnson, Robert. B
AU  - Degraff, V. Jerome
TI  - Principles of Engineering Geology
U1  - 624. 131.1 
PY  - 1988///
CY  - New Delhi
PB  - John Wiley
KW  - Principles of Engineering Geology
N1  -  Ref. at the end of each chap
ER  -