Centre d'Etude de I'Azote <br/><br/>
1970 Fertilizer Guide: for Food Grains in the Tropics and Subtropics 

 - Zurich  Centre d'Etude de I'Azote  1970 
 -  p.119.:ill. 
<br/><br/><label>Subjects--Index Terms: </label>Food Grains in the Tropics and Subtropics 
<br/><br/><label>Universal Decimal Class. No.: </label>631.82  / DOA