Smith, Robert Leo. <br/><br/>
The ecology of man :  an ecosystem approach / 
Robert Leo Smith. 
 - New York :  Harper & Row,  c1972. 
 - xii, 436 p. :  ill. 
<br/><br/><label>ISBN: </label>0060463368 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.