TY  - BOOK
AU  - Branson,E.B.
TI  - Introduction to geology. 3rd ed
U1  - 551.7 
PY  - 1952///
CY  - NY
PB  - McGraw-Hill
KW  - Petro
KW  - Economic
KW  - Gems
KW  - Geology
KW  - Petrology
ER  -