Fertilizers and their use :  a pocket guide for extension officers. 

 - 2nd ed. rev. 
 - Rome,  [1971]. 
<br/><br/> First published in this ed. in 1970. 
<br/><br/>Bibliography: p. 53-54. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures -- Handbooks, manuals, etc.--Fertilizers and manures -- Handbooks, manuals, etc.