TY  - BOOK
AU  - Ernest G Ehlers,
AU  - Harvey Blatt
TI  - Petrology:  : igneous, sedimentary and metamorphic
SN  - 0716712792
AV  - GY QE431.2.E38	 
PY  - 1980///
CY  - San Francisco
PB  -  : W. H. Freeman and Company
KW  - Petrology
N1  - includes bibliographic reference and indexes
ER  -