University of Illinois Urbana-Champaign

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Showing 2731–2760 of 2,789 items
Thumbnail for Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Willman, Harold Bowen; Payne, James Norman; Voskuil, Walter Henry

Thumbnail for Limestone resources of Illinois
Limestone resources of Illinois
Krey, Frank; Lamar, J.E.

Thumbnail for Pennsylvanian fusulinidae of Illinois,
Pennsylvanian fusulinidae of Illinois,
Dunbar, Carl O.; Henbest, Lloyd G.; Weller, J. Marvin

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