Bates, Robert L. (Robert Latimer), 1912-, <br/><br/>
Our modern stone age / 
Robert L. Bates and Julia A. Jackson. 
 - Los Altos, California :  William Kaufmann,  1982. 
 - 132 pages ;   28 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0865760276 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nonmetallic minerals.