Buchanan, R.C. “‘To Bring Together, Correlate, and Preserve’ - A History of the Kansas Geological Survey, 1864-1989”.
Bulletin (Kansas Geological Survey), no. 227 (January 1, 1989): 1–96. Accessed April 11, 2025.
https://journals.ku.edu/kgsbulletin/article/view/22275.