Walker, Stephen F. <br/><br/>
Animal thought / 
Stephen F. Walker 
 - London :  Routledge & Kegan Paul,  1983 
 - 437 p. ;  24 cm. 
 - International library of psychology .
<br/><br/>Bibliography: p.389-426 
<br/><br/><label>ISBN: </label>0710090374 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal intelligence