Não informado. (1881). Bulletin of the American Museum of Natural History. American Museum of Natural History.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the American Museum of Natural History. New York: American Museum of Natural History, 1881.
MLA-referens (8:e uppl.)Não informado. Bulletin of the American Museum of Natural History. American Museum of Natural History, 1881.
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