TY  - BOOK
AU  - Williams Howel
AU  - Gilbert C M
AU  - Turner F J
TI  - Petrography: an introduction to the study of rocks in thin sections
U1  - 552 
PY  - 1955///
CY  - San Francisco
PB  - Freeman
KW  - Petrograpy
KW  - Petrology
KW  - Rocks
ER  -