University of Illinois Urbana-Champaign

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Showing 3571–3600 of 5,738 items
Thumbnail for Algae in Selected Illinois Streams, 1971-1976
Algae in Selected Illinois Streams, 1971-1976
Lin, S.D.; Evans, R.L.; Beuscher, Davis B.

Thumbnail for Headwaters area assessment
Headwaters area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis