O'Connor, Howard G., John M. Jewett, and Raymond C. Moore. “The Red Eagle Formation in Kansas Orthography As a Factor in Stability of Stratigraphical Nomenclature”. Bulletin (Kansas Geological Survey), no. 96 (January 1, 1952): 335–379. Accessed January 3, 2026. https://journals.ku.edu/kgsbulletin/article/view/22056.