Winchell, Alexander N. <br/><br/>
Elements of optical mineralogy :   an introduction to microscopic petrography / 
Alexander N. Winchell. 
 - 5th ed. 
 - London :  John Wiley & Sons, Inc.,  c 1949. 
 - P. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>P. 1- Principles and method ; 
<br/><br/>331  331 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy.
<br/><br/><label>Dewey Class. No.: </label>549 / W721e