T. R. . Carr, N. L. . Anderson, and T. Pulliam, “Case History of Walta Field (Simpson and Mississippian), Sumner County, Kansas”, kgsbulletin, no. 237, pp. 153–157, Apr. 2024, Accessed: Jul. 03, 2024. [Online]. Available: https://journals.ku.edu/kgsbulletin/article/view/20438