FAO Current World Fertilizer Situation and Outlook  FAO 
Food and Agriculture Organization of the United NationsOrganizacion de las Naciones Unidas para la Agricultura y la AlimentacionOrganization des Nations Unies pour l'Alimentation et l'Agriculture 
 - Rome, IT  Food and Agriculture Organization of the United Nations  1991. Data final de publicação em 1997 
 - periodicidade desconchecida 
<br/><br/>1991; 1993; 1995; 1996; 1997; 1998; 2003;  
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