TY  - BOOK
AU  - Ehlers Ernest G and Blatt Harvey
TI  - Petrology: igneous, sedimentary, and metamorphic
SN  - 9788123910321
U1  - 552 EHL 
PY  - 1999///
CY  - New Delhi
PB  - CBS Publishers and Distributors Pvt.Ltd.
ER  -