TY  - BOOK
AU  - Ehlers Ernest G.
TI  - Petrology: : Igneous Sedimentary and Metamorphic 
SN  - 812391032
U1  - 552 
PY  - 1999///
CY  - New Delhi: 
PB  - CBS Publisher, 
KW  - Earth Science
KW  - Igneous
KW  - Petrology
KW  - Sedimentary
ER  -