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(1963) Report on the Water Pollution Investigation of Walnut Creek Below Urbandale, Iowa, 1963. Natural Resources, Department of
(1995) Waste Matters, December 1995. Natural Resources, Department of
(2002) Reports on the Walnut Creek Watershed Monitoring Project, Jasper County Iowa, Water Years, 1995-2000, February 2002. Natural Resources, Department of
(2003) Waste Matters, July 2003. Natural Resources, Department of
(2004) Waste Matters, January 2004. Natural Resources, Department of
(2004) Waste Matters, May 2004. Natural Resources, Department of
(2004) Waste Matters, September 2004. Natural Resources, Department of
(2014) Iowa Great Lakes Sanitary District,. Natural Resources, Department of