Food and Agriculture Organization of the Nations. Statistics Division. (1966). Statistics of crop responses to fertilizers. s.n.
Chicago-referens (17:e uppl.)Food and Agriculture Organization of the Nations. Statistics Division. Statistics of Crop Responses to Fertilizers. Rome: s.n, 1966.
MLA-referens (9:e uppl.)Food and Agriculture Organization of the Nations. Statistics Division. Statistics of Crop Responses to Fertilizers. s.n, 1966.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.