Clays and clay minerals :  proceedings of the ninth national conference on clays and clay minerals / 
edited by Ada Swineford. ...[et. al]. 
 - London :   Pergamon Press,  c 1962. 
 - Vols. :  ill. ;  24 cm. 
 - International series of monograph on earth sciences. .
<br/><br/> Includes index. 
<br/><br/>V. 9-- ; 
<br/><br/>326  326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic geology.
<br/><br/><label>Dewey Class. No.: </label>553 / N213p