Elledge, Emmett R., and Paul Teetor. “The Economic Geology of the Arkansas City District Clay and Shale Resources in the Vicinity of Arkansas City, Kansas”. Bulletin (Kansas Geological Survey), no. 8 (January 1, 1921): 1–47. Accessed July 22, 2024. https://journals.ku.edu/kgsbulletin/article/view/21828.