TY  - BOOK
AU  - Williams,Howel
AU  - Turner,Francis J.
AU  - Gilbert,Charles M.
TI  - Petrography: an introduction to the study of rocks in thin sections 
PY  - 1955///
CY  - San Francisco
PB  - W. H. Freeman
KW  - Petrology
KW  - Thin sections (Geology)
ER  -