TY  - BOOK
AU  - Wahlstrom,Ernest Eugene
TI  - Petrographic mineralogy
U1  - 552.1 
PY  - 1955///
CY  - New York
PB  - Wiley
KW  - Mineralogy, Determinative
KW  - Rocks
KW  - Classification
N1  - Includes index
ER  -