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 
PY  - 1954///
CY  - Feffer and Simons Private Ltd., Bombay
PB  - Vakils
KW  - Petrology
N1  - Includes index; Bibliography :page 385-386
ER  -