Fertilizer guide for food grains in the tropics and subtropics 

 - Zurich :  Centre d'etude de l'azote,  1970 
 - 119 p. 
<br/><br/><label>LCCN: </label>52539 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cultivos tropicales.<br/>Fertilizantes para cereales.<br/>Plantas--Nutrición.
<br/><br/><label>Dewey Class. No.: </label>631.8  / F57