TY  - BOOK
AU  - Williams,Howel
AU  - Turner,Francis J.
AU  - Gilbert,Charles M.
TI  - Petrography: an introduction to the study of rock in thin sections 
SN  - 716702061
PY  - 1954///
CY  - San Francisco
PB  - W.H.Freeman
KW  - Petrology
N1  - Includes index; Bibliography :p.385-386
ER  -