The Online Books Page

Books by Richard F. Duwelius:

Books in the extended shelves:

• Duwelius, Richard F.: Effects of surface coal mining and reclamation on the geohydrology of six small watersheds in west-central Indiana (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1990), also by Jeffrey D. Martin, Charles G. Crawford, and Geological Survey (U.S.) (page images at HathiTrust)
• Duwelius, Richard F.: Geohydrology, water quality, and simulation of ground-water flow in the vicinity of a former waste-oil refinery near Westville, Indiana, 1997-2000 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2002), also by Geological Survey (U.S.) and United States Environmental Protection Agency (page images at HathiTrust)
• Duwelius, Richard F.: Ground-water levels, flow, and quality in northwestern Elkhart County, Indiana, 1980-89 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1991), also by Cheryl A. Silcox, Geological Survey (U.S.), and Elkhart Water Works (page images at HathiTrust)
• Duwelius, Richard F.: Ground water quality in the Calumet Region of the northwestern Indiana and northeastern Illinois, June 1993 (U.S. Geological Survey ;, 1996), also by Scott T. Prinos, Robert T. Kay, United States Environmental Protection Agency, and Geological Survey (U.S.) (page images at HathiTrust)
• Duwelius, Richard F.: Hydraulic conductivity of the streambed, east branch Grand Calumet River, northern Lake County, Indiana (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1996), also by Geological Survey (U.S.) and Indiana. Department of Environmental Management (page images at HathiTrust)
• Duwelius, Richard F.: Summit Lake Reservoir, Henry County, East-Central Indiana, water years 1989 and 1990 (U.S. Geological Survey ;, 1993), also by Geological Survey (U.S.) and Indiana. Department of Natural Resources (page images at HathiTrust)

Find more by Richard F. Duwelius at your library, or elsewhere.