FAO fertilizer yearbook 

 - Rome  Food and Agriculture Organization of United Nations      1985 
 - iv,157p  cm. 
 - FAO statistics series no. 62 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(J:2,4).1.N84, M85