Boardman, Darwin R., II, Bruce R. Wardlaw, and Merlynd K. Nestell. “Part B: Conodont Distribution, Systematics, Biostratigraphy, and Sequence Stratigraphy of the Uppermost Carboniferous and Lower Permian (uppermost Wabaunsee, Admire, Council Grove, and Lower Chase Groups) from the North American Midcontinent”. Bulletin (Kansas Geological Survey), no. 255 (January 1, 2009): 1–146. Accessed January 3, 2026. https://journals.ku.edu/kgsbulletin/article/view/20376.