Waal, Frans de <br/><br/>
Primates and philosophers : how morality evolved / 
Waal, Frans de. 
 - Oxford:  Princeton University Press,  2009. 
 - xix, 209p.; 23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0691141299 
<br/><br/><label>Dewey Class. No.: </label>171.7 WAA