Ruthenberg, Hans <br/><br/>
Farming systems in the teopics 

 - 2nd ed. 
 - Oxford:  Oxford University Press,  1976. 
 - xviii, 366p. 
<br/><br/> Includes index and bibliography 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0198594585 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture-Tropics
<br/><br/><label>Dewey Class. No.: </label>630.913  / RUF