Não informado. (2018). Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers.
Citace podle Chicago (17th ed.)Não informado. Report on the Illinois State Museum of Natural History. Springfield, Ill: Phillips Bros., State Printers, 2018.
Citace podle MLA (8th ed.)Não informado. Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers, 2018.
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