The encyclopedia of mineralogy 
<label>;</label> Frye, Keith 
 - Stroudsburg  Hutchinson Ross Publishing Co.  1981 
 - xx,794p.  ill.  27 cm. 
<br/><br/> Encyclopedia of earth sciences, Vol.IVB 
<br/><br/>PR 
<br/><br/><label>ISBN: </label>0879331844 
<br/><br/><label>Dewey Class. No.: </label>549.03  / E