Richard F Duwelius

• Geohydrology, simulation of ground-water flow, and ground-water quality at two landfills, Marion County, Indiana
• Ground-water levels and directions of flow in the vicinity of a well field, Elkhart, Indiana, December 1989
• Ground-water levels, flow, and quality in northwestern Elkhart County, Indiana, 1980-89
• Ground-water quality in the Calumet Region of northwestern Indiana and northeastern Illinois, June 1993
• Hydraulic conductivity of the streambed, east branch Grand Calumet River, northern Lake County, Indiana
• Water-resources programs and hydrologic-information needs, Marion County, Indiana, 1987