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Subject "Rock River"
Rock River area assessment / Illinois Department of Natural Resources, Office of Scientific Research and Analysis, Natural History Survey Division, in conjunction with State Geological Survey Division.
By: Illinois. - Illinois State Geological Survey.
Publication info: Springfield, IL :Illinois Dept. of Natural Resources,1996-
Contributed by: University of Illinois Urbana Champaign
Subjects: Illinois Natural areas Natural resources Natural resources surveys Rock River Rock River Region (Wis. and Ill.) Rock River Watershed (Wis. and Ill.)