Bates, Robert Latimer,  1912- <br/><br/>
Our modern stone age 
Robert L. Bates, Julia A. Jackson 
 - Los Altos, Calif  W. Kaufmann  c1982 
 - vii, 132 p.  ill.  29 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nonmetallic minerals