Food and Agriculture Organization of the United Nations. (1983). FAO fertilizer yearbook 1982. Food and Agriculture Organization of the United Nations.
Chicago-referens (17:e uppl.)Food and Agriculture Organization of the United Nations. FAO Fertilizer Yearbook 1982. Rome: Food and Agriculture Organization of the United Nations, 1983.
MLA-referens (9:e uppl.)Food and Agriculture Organization of the United Nations. FAO Fertilizer Yearbook 1982. Food and Agriculture Organization of the United Nations, 1983.
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