Jakosky, J.J, R.M. Dreyer, and C.H. Wilson. “Geophysical Investigations in the Tri-State Zinc and Lead Mining District”. Bulletin (Kansas Geological Survey), no. 44 (January 1, 1942): 1–151. Accessed February 26, 2026. https://journals.ku.edu/kgsbulletin/article/view/21931.