Ruthenberg, Hans <br/><br/>
Farming systems in the tropics 
Hans Ruthenberg 
 - Oxford :   Clarendon Press,  1976. 
 - xi,366p.    : ill.  ; 23cm. 
<br/><br/>Includes bibliographical references and index<br/> 
<br/><br/><label>ISBN: </label>0-19859461-5 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>SB111.R87	 
<br/><br/><label>Dewey Class. No.: </label>