Beets  Willem  C. <br/><br/>
Raising and Sustaining  Productivity  of  smallholder  Farming Systems  in the  Tropics 

 - Alkmaar, Holland  AGBE    1990 
 -  738.P;Map;Pic;ill 
<br/><br/><label>ISBN: </label>9748567613 
<br/><br/><label>Universal Decimal Class. No.: </label>631.58  / DOA