Winchell, Alexander N. <br/><br/>
Elements of optical mineralogy :   an introduction to microscopic petrography / 
Alexander Newton Winchell. 
 - 4th ed. 
 - London :  John Wiley & Sons,  c 1951. 
 - Parts :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>P. 2- Description of minerals ; 
<br/><br/>333  333 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy--London.
<br/><br/><label>Dewey Class. No.: </label>549 / W721e