Fertilizers and high yielding varieties of rice wheat and maize in t he developing countries. 

 - Zurich :    Centre D'etude de L'azote,    1970. 
 - iv, 30 p. :    ill. (part col.) ;    16 x 22 cm. 
<br/><br/>  Published on the occasion of the Second World Food Congress. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Grain -- Fertilizers.<br/> Grain -- Varieties.
<br/><br/><label>Dewey Class. No.: </label>FAO HYV (08)1/2