De Geus, J.G.  <br/><br/>
Fertilizer guide for food grains in the tropics and subtropics  (Book) 

 - Zurich  Centre d'Etude de l' Azote  1970 
 - 119 p.  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers Tropical crops
<br/><br/><label>Universal Decimal Class. No.: </label>631.8 : 633.25 GEU  / 7449