Brady, Lawrence L., and Christopher G. Maples. “A Reference Section for the Pennsylvanian Lorton Coal Bed (Root Shale: Wabaunsee Group) in Kansas”. Bulletin (Kansas Geological Survey), no. 230 (April 16, 2024): 17–20. Accessed July 3, 2024. https://journals.ku.edu/kgsbulletin/article/view/20482.