Varley, E.R <br/><br/>
Sillimanite / 
Varley, E.R. 
 - New York:  Chemical publishing,  1968. 
 - 165p;25cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8170000471 
<br/><br/><label>Dewey Class. No.: </label>540 VAR