Williams, Howel,  1898- <br/><br/>
Petrography :  an introduction to the study of rocks in thin secti ons / 
Howel Williams, Francis J. Turner and Charles M. Gilbert 
 - 2nd ed 
 - San Francisco :  W. H. Freeman ,  1982 
 - xiv, 626 p. :  ill. ;  24cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0716713764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology<br/>Thin sections--Geology
<br/><br/><label>Dewey Class. No.: </label>552