THE DEVELOPMENT OF A KARST FEATURE DATABASE FOR SOUTHEASTERN MINNESOTA Date Issued 2005 Author Gao, Yongli Alexander, Jr., E. Calvin Tipping, Robert G. Main Topic Water Quality & Pollutants
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
