Williams, Howel,  1896- <br/><br/>
Petrography :  an introduction to the study of rock in thin sections / 
by Howell Williams, Francis J.Turner and Charles M.Gilbert. 
 - San Francisco :  W.H.Freeman,  1954. 
 - 406 p.  ill. ;  24 cm. 
 - A series on books in geology. .
<br/><br/> Includes index. 
<br/><br/>Bibliography :p.385-386. 
<br/><br/><label>ISBN: </label>716702061 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology.