Newell, K. David, W. Lynn Watney, Stephen W.L. Cheng, and Richard L. Brownrigg. “Stratigraphic and Spatial Distribution of Oil and Gas Production in Kansas”. Bulletin (Kansas Geological Survey) (January 1, 1987): 1–86. Accessed April 4, 2025. https://journals.ku.edu/kgsbulletin/article/view/23611.