2013 Survey of Iowa groundwater and evaluation of public well vulnerability classifications for contaminants of emerging concern - Hruby, Claire; Libra, Robert; Fields, Chad; Kolpin, Dana; Hubbard, Laura; Borchardt, Mark; Spencer, Susan; Wichman, Michael; Hall, Nancy; Schueller, Michael; Furlong, Edward; Weyer, Peter (Iowa Geological and Water Survey Technical Information Series, 2015)