Não informado. (2007). Annual report of the Director of the Board of Trustees. Field Museum of Natural History.
Citace podle Chicago (17th ed.)Não informado. Annual Report of the Director of the Board of Trustees. Chicago, Ill: Field Museum of Natural History, 2007.
Citace podle MLA (8th ed.)Não informado. Annual Report of the Director of the Board of Trustees. Field Museum of Natural History, 2007.
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