Handbook of mineralogy  2,2  Silica, Silicates : Pt. 2 
J. W. Anthony ... 
 - IIS., S. 447 - 904 
<br/><br/><label>ISBN: </label>0962209716 
<br/><br/><label>LCCN: </label>89013673  
<br/><br/><label>Dewey Class. No.: </label>549