TY  - BOOK
AU  - Ehlers,Ernest G.
AU  - Blatt,Harvey
TI  - Petrology: igneous, sedimentary, and metamorphic 
SN  - 0716712792
PY  - 1982///
CY  - New York, N.Y.
PB  - W.H. Freeman and Company
KW  - Petrology
N1  - Includes index; Contents : Igneous rocks--Sedimentary rocks--Metamorphic rocks
ER  -