Cox, George W. <br/><br/>
Agricultural ecology  : an analysis of world food production systems 

 - San Francisco, Ca. :  Freeman,  1979 
 - 721 p.  : ilus. ; gráfs. 
<br/><br/><label>LCCN: </label>31411 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología agrícola.<br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>630.215  / C6