Perkins, Ronald D., T.G. Perry, and Donald E. Hattin. “Some Bryozoans from the Beil Limestone Member of the Lecompton Limestone (Virgilian) of Kansas”. Bulletin (Kansas Geological Survey), no. 157 (January 1, 1962): 1–25. Accessed December 31, 2025. https://journals.ku.edu/kgsbulletin/article/view/22171.