Ruthenberg, Hans. <br/><br/>
Farming systems in the tropics / 
Hans Ruthenberg. 
 - 3rd edition. 
 - Oxford :  New York :  Clarendon Press ;  Oxford University Press,  c1980. 
 - xxii, 424 pages :  Illustrations ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. [397]-414. 
<br/><br/><label>ISBN: </label>0198594828 (pbk.) 
<br/><br/><label>Nat. Bib. No.: </label>GB80 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems--Tropics.<br/>Farm management--Tropics.
<br/><br/><label>LC Class. No.: </label>S604.37  / .R87 1980 
<br/><br/><label>Dewey Class. No.: </label>630/.913