University of Illinois Urbana-Champaign

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Thumbnail for A Regional Ground-Water Quality Characterization of the Rockford Area, Winnebago County, Illinois
A Regional Ground-Water Quality Characterization of the Rockford Area, Winnebago County, Illinois
Wehrmann, H. Allen; Holm, Thomas R.; Le Seur, Linda P.; Curtiss, Charles D. III

Thumbnail for Mackinaw River area assessment.
Mackinaw River area assessment.
Illinois Department of Natural Resources

Thumbnail for Illinois Technograph v. 041 (1928-1929)
Illinois Technograph v. 041 (1928-1929)
Submitter: Timothy Donohue