University of Illinois Urbana-Champaign

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Thumbnail for The upper Des Plaines River basin: an inventory of the region's resources
The upper Des Plaines River basin: an inventory of the region's resources
Illinois Deptartment of Natural Resources Office of Realty and Environmental Planning

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

Thumbnail for Sinkhole Plain area assessment
Sinkhole Plain area assessment
Submitter: Steven Mccauley