Singer Peter <br/><br/>
Expanding Circle    Ethics and Sociobiology .      

 - Oxford  Clarendon Press        1981 
 - xii,190p.  cm. 
<br/><br/><label>Standard No.: </label>52246 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R4, M1