Thompson, Thomas L., and Edwin D. Goebel. “Preliminary Report on Conodonts of the Meramecian Stage (Upper Mississippian) from the Subsurface of Western Kansas”. Bulletin (Kansas Geological Survey), no. 165 (December 31, 1963): 1–16. Accessed January 2, 2026. https://journals.ku.edu/kgsbulletin/article/view/20552.