Não informado. (1973). Forest genetic resources information. Food and Agriculture Organization of the United Nations.
Chicago-referens (17:e uppl.)Não informado. Forest Genetic Resources Information. Rome: Food and Agriculture Organization of the United Nations, 1973.
MLA-referens (8:e uppl.)Não informado. Forest Genetic Resources Information. Food and Agriculture Organization of the United Nations, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.