 | Voorhies, M.R., 1994. Camels, Rhinos and Four-Tuskers. Nebraska History 75: 42-55, 15 figs, http://www.nebraskahistory.org/publish/publicat/history/full-text/NH1994Time2_Camels.pdf
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 | Voorhies, M.R.; Holman, J.A.; Xue, Xiang-Xu, 1987. The Hottell Ranch rhino quarries (basal Ogallala: medial Barstovian), Banner County, Nebraska – Part I. Geologic setting, faunal list, lower vertebrates. Contributions to Geology, Univ. of Wyoming; 25 (1): 55-69, 9 figs, 3 tabs.
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 | Voorhies, M.R., 1985. A Miocene rhinoceros herd buried in volcanic ash. National Geographic Society Research Reports 19: 671-688, 3 figs, 2 tabs.
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