TY  - BOOK
AU  - Ehlers Ernest G
AU  - Blatt Harvey
TI  - Petrology : Igneous, Sedimentary and Metamorphic
SN  - 8123910320
U1  - 552/EHL 
PY  - 1999///
CY  - New Delhi
PB  - CBS Publishers and Distributors Pvt ltd
KW  - GEOLOGY
ER  -