University of Illinois Urbana-Champaign

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Showing 3481–3510 of 3,538 items
Thumbnail for Handbook of Illinois stratigraphy
Handbook of Illinois stratigraphy
Willman, Harold Bowen; Atherton, Elwood; Buschbach, T.C.; Collinson, Charles William; Frye, John Chapman; Hopkins, M.E.; Lineback, Jerry Alvin; Simon, Jack A.

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

Thumbnail for Illinois Technograph v. 046 (1931-1932)
Illinois Technograph v. 046 (1931-1932)
Submitter: Timothy Donohue