Layzell, Anthony L., Robert S. Sawin, Rolfe D. Mandel, Greg A. Ludvigson, Evan K. Franseen, Ronald R. West, and W. Lynn Watney. “Quaternary Stratigraphy and Stratigraphic Nomenclature Revisions in Kansas”. Current Research in Earth Sciences, no. 263 (December 4, 2017): 1–8. Accessed January 28, 2025. https://journals.ku.edu/cres/article/view/11811.