NATIONAL ACADEMY OF SCIENCES, NATIONAL RESEARCH COUNCIL <br/><br/>
CLAYS AND CLAY MINERALS: PROCEEDINGS OF THE NINETH NATIONAL CONFERENCE ON CLAYS 

 - 9 
 - OXFORD  Pergamon Press  1962 
 - 23X15 
<br/><br/><label>Dewey Class. No.: </label>549.1145 N277