TY  - BOOK
AU  - Ehlers, Ernest G. 
AU  -  Blatt, Harvey 
TI  - Petrology: Igneous, sedimentary, and metamorphic 
SN  - 8123910329
PY  - 1999///
CY  - New delhi.
PB  - CBS publishers and distriburors.
KW  - Petrology
N1  - Include index
ER  -