TY  - GEN
AU  - Williams,Howel
AU  - Turner,Francis J.
AU  - Gilbert,Charles M.
TI  - Petrography: an introduction to the study of rocks in thin sections 
U1  - 552 22
PY  - 1954///]
CY  - San Francisco
PB  - W. H. Freeman and Company
KW  - Petrology
KW  - BUEsh
KW  - Thin sections (Geology)
KW  - Reading book
N1  - Includes bibliographical references and index
ER  -