Sinkholes, Sinkhole Probability, and Springs and Seeps Image Date Issued 2003 Author Alexander, Jr., E. Calvin Berner, David J. Gao, Yongli Green, Jeffrey A. Main Topic Groundwater Wastewater Hydrology
Hydrogeology of the Paleozoic bedrock in southeastern Minnesota, Report of Investigations Image Date Issued 2003 Author Runkel, Anthony C. Tipping, Robert G. Alexander, Jr., E. Calvin Green, Jeffrey A. Main Topic Wastewater
