Food and agriiculture orginization <br/><br/>
Fertilizers and their use , a pocket guide for extension officers 

 - 2nd ed. 
 - Rome  Food and Agriculture Orginization of the United Nations  1970 
 - x,54p.; 18cm. 
<br/><br/> [reprinted 1971] 
<br/><br/><label>Dewey Class. No.: </label>581.5  / FAO