Premack, David. <br/><br/>
Original intelligence :  unlocking the mystery of who we are / 
David and Ann Premack. 
 - New York :  McGraw-Hill,  2003. 
 - ix, 274p :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p.245-263) 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0071381422 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal intelligence.<br/>Genetic psychology.<br/>Chimpanzees--Psychology.