[1]
. J. C. Frye and C. W. Hibbard, “Pliocene and Pleistocene Stratigraphy and Paleontology of the Meade Basin, Southwestern Kansas”, kgsbulletin, no. 38, pp. 396–432, Jan. 1941, doi: 10.17161/kgsbulletin.no.38.21779.