Fertilizers:  Annual review of world production, consumption and trade of fertilizers 1968 
/ Food and agriculture organization of the United Nations  
 - Rome:   Food and agriculture organization of the United Nations,   1969 
 - viii, 140p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Subjects--Index Terms: </label>Fertilizer Nitrogen 
<br/><br/><label>Universal Decimal Class. No.: </label>631.8:31(047.1)(100)