University of Illinois Urbana-Champaign

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Showing 3451–3480 of 4,594 items
Thumbnail for Preliminary Report on the Ground-Water Resources of the Havana Region in
Preliminary Report on the Ground-Water Resources of the Havana Region in
Walker, William H.; Bergstrom, Robert Edward; Walton, William Clarence

Thumbnail for Upper Rock River area assessment
Upper Rock River area assessment
Illinois Department of Natural Resources, Office of Scientific Research; Illinois Department of Natural Resources, Illinois State Water Survey