Geus Jan G De <br/><br/>
Fertilizer Guide for Tropics & Subtropics .-Edn 2 

 - Edn 2 
 -  Centre d'Etude del Azote, Zurich 
 - pp 774, pls 80;   19*13 
<br/><br/><label>Dewey Class. No.: </label>J2:4/N73/B13056