Author: Semken, H.A., Jr., 1966.:
Title: Stratigraphy and paleontology of the McPherson Equus Beds (Sandahl local fauna), McPherson County, Kansas.
Description: Contr. Mus. Paleont. Univ. Michigan, 20(6): pp. 121-178, several drawings in 7 figs., 1 fold. map, refs. New plain wrs. - Middle Pleistocene, mostly mammals.

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