Donald A. Keefer
Illinois State Geol Survey, Champaign, IL
Activity
2003
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ILLINOIS’ AQUIFER SENSITIVITY TO CONTAMINATION BY PESTICIDE LEACHING– INITIAL EVALUATION
11 Hydrogeologic Problems in the Midwestern U.SMonday, 24 March 20031:00 PM - 5:00 PM
2002
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ADDRESSING UNCERTAINTY IN GEOLOGIC DATA AND MAPS
13 Electronic Communication of Geologic Information and Digital Geologic MappingWednesday, 3 April 20021:00 PM - 5:00 PM