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

 - London  Oxford University Press  1971 
 - 302p 
<br/><br/>Hans Ruthenberg: Farming systems in the tropics.  London.  Oxford University Press, 1971.--(630.913RUT)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>630.913  / RUT