Ruthenberg, Hans. <br/><br/>
Farming systems in the tropics 

 - 3 ed. 
 - Oxford :  Clarendon,  1980 
 - 424 p.  : ilus. ; láms. 
 - Oxford science publications .
 - Oxford science publications .
<br/><br/><label>LCCN: </label>53975 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Trópicos.<br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>631.0913  / R8 1980