Geus, J.G. de   <br/><br/>
Fertilizer guide for tropical and subtropical farming  (Book) 

 - Zurich  Centre d'Etude de l'Azote  1967 
 - 727p.  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Tropics Tropical crops--Fertilizers
<br/><br/><label>Universal Decimal Class. No.: </label>631.8 GEU  / 7963