TY  - BOOK
AU  - Williams, Howel
TI  - Petrography: an introduction to the study of rocks in thin section
U1  - 552 
PY  - 1982///
CY  - San Francisco
PB  - W. H. Freeman And Company
KW  - Petrology
KW  - Thin sections (Geology)
KW  - Rocks
ER  -