Parker, Sue T.  Miles, H. Lyn  Mitchell, Robert W. <br/><br/>
Mentalities of Gorillas and Orangutans  Comparative Perspectives 

 -  Cambridge University Press  1999. 
 - 433 
<br/><br/><label>ISBN: </label>0521580277 
<br/><br/><label>Dewey Class. No.: </label>599.88/3  /