1. Williamson, J.E. and Carter, J.M. (2001) Water-Quality Characteristics in the Black Hills Area, South Dakota. U.S. Geological Survey, Water-Resources Investigations Report 01-4194. https://pubs.usgs.gov/wri/wri014194/pdf/wri014194.pdf
2. Stetler, L.D. and Davis, A.D. (2005) Gypsum and Carbonate Karst along the I-90 Development Corridor, Black Hills, South Dakota. U.S. Geological Survey Karst Interest Group Proceedings, Rapid City, 12-15 September 2005, U.S. Geological Survey, Scientific Investigations Report 2005-5160, 134. https://pubs.usgs.gov/sir/2005/5160/PDF/sir2005-5160part3C.pdf
3. Epstein, J.B. (2005) National Evaporite Karst-Some Western Examples. U.S. Geological Survey Karst Interest Group Proceedings, Rapid City, 12-15 September 2005, U.S. Geological Survey, Scientific Investigations Report 2005-5160, 122-133. https://pubs.usgs.gov/sir/2005/5160/PDF/sir2005-5160part3C.pdf
4. Naus, C.A., Driscoll, D.G. and Carter, J.M. (2001) Geochemistry of the Madison and Minnelusa Aquifers in the Black Hills Area, South Dakota. U.S. Geological Survey, Water-Resources Investigations Report 01-4129. https://pubs.usgs.gov/wri/wri014129/pdf/wri014129.pdf
5. Characterization of ground-water flow and water quality for the Madison and Minnelusa aquifers in northern Lawrence County, South Dakota