The extinct mammalian fauna of Dakota and Nebraska : Including an account of some allied forms from other localities, together with a synopsis of the mammalian remains of North America Leidy, Joseph, 1823-1891 creator text book Philadelphia Published for the Academy, by J.B. Lippincott 1869 1869
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ENG Geology Geology, Stratigraphic Great Plains Mammals, Fossil Paleontology Tertiary QE881 L4 Journal of the Academy of Natural Sciences of Philadelphia, 2nd ser., v. 7 https://www.biodiversitylibrary.org/bibliography/20910 10.5962/bhl.title.20910 OTU