Jewett, J. M., Schoewe, W., Dreyer, R., Frye, J. C., Keroher, R., Kinney, E. D., Plummer, N. D., & Romary, J. F. (1942). Kansas Mineral Resources for Wartime Industries / with other chapters. Bulletin (Kansas Geological Survey), 41, 73-180. https://journals.ku.edu/kgsbulletin/article/view/21923