FAO fertilizer yearbook 

 - Rome  Food and Agriculture Organization of the United Nations     1983 
 - iv, 143p  cm. 
 - FAO statistics series no.48 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(J:2,4).1.N82, M3