Time, energy and stone tools 
edited by Robin Torrence. 
 - London:  Cambridge University Press,  1989. 
 - 124 pages :   illustrations ;   28 cm. 
 - New directions in archaelogy .
<br/><br/>pages 112-120. 
<br/><br/><label>ISBN: </label>0521253500  RM297.90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Man, Prehistoric--Tools.<br/>Stone implements.