TY  - BOOK
AU  - Ehlers, Ernest G. .
TI  - Petrology
U1  - 552.5 
PY  - 1987///
CY  - Delhi
PB  - CBS Publishers & Distributors
KW  - Geology-Petrology
KW  - Petrology-Rocks
KW  - Petroleum geology
KW  - Rocks-Petrology
KW  - PG-Geology
N1  - Index
ER  -