Não informado. (2018). Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Report on the Illinois State Museum of Natural History. Springfield, Ill: Phillips Bros., State Printers, 2018.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers, 2018.
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