TY  - BOOK
AU  - Williams Howel
AU  -  Gilbert Charles M
AU  -  Turner Francis J
TI  - Petrography: an introduction to the study of rocks in thin sections
U1  - H2, J4;4 
PY  - 1985///
CY  - Delhi
PB  - CBS Publishers & Distributors      
KW  -  Petrography
KW  - Geology
N1  - Index 602-626p
ER  -