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Hattin, D. E., 1977, Upper Cretaceous stratigraphy, paleontology, and paleoecology of western Kansas: The Mountain Geologist, V. 4, no. 3-4 , p. 175-21.

Hattin, D. E., 1982, Stratigraphy and depositional environment of Smoky Hill Chalk Member, Niobrara Chalk (Upper Cretaceous) of the type area, western Kansas: Kansas Geological Survey Bulletin, V. 225, p. 1-108.

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