Não informado. (1948). FAO Agricultural Studies. Food and Agriculture Organization of the United Nations.
Lua i Stíl Chicago (17ú heag.)Não informado. FAO Agricultural Studies. New York: Food and Agriculture Organization of the United Nations, 1948.
Lua MLA (8ú heag.)Não informado. FAO Agricultural Studies. Food and Agriculture Organization of the United Nations, 1948.
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