Carlson, M.P., and S.B. Treves. “Characterization and Geologic Setting of the Elk Creek Carbonatite, Southeast Nebraska, USA”. International Kimberlite Conference: Extended Abstracts 8 (June 22, 2003). Accessed March 28, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2980.