Barash, David P. <br/><br/>
The whisperings within / 
David Barash. 
 - Harmondsworth ;  New York :  Penguin Book,  1981, c1979. 
 - 274 p. ;  20 cm. 
<br/><br/><label>ISBN: </label>0140056998 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>155.7