TY  - BOOK
AU  - Pearl, Richard M. .
TI  - How to Know the Minerals and Rocks
U1  - 552.1 
PY  - 1955///
CY  - New York
PB  - McGraw - Hill book company
KW  - Geology
KW  - Minerals and Rocks
KW  - G-Geology
N1  - Index
ER  -