University of Illinois Urbana-Champaign

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Showing 31–60 of 934 items
Thumbnail for Subsurface geochemical investigation in western and southern Illinois : a pilot study
Subsurface geochemical investigation in western and southern Illinois : a pilot study
Erickson, Ralph Leroy; Erickson, M.S.; Chazin, Barbara; Baxter, James W.; Masters, J.M.; Eidel, J. James

Thumbnail for Mines in the Illinois portion of the Illinois-Kentucky Fluorspar District
Mines in the Illinois portion of the Illinois-Kentucky Fluorspar District
Denny, F. Brett; Nelson, W. John; Breeden, Jeremy R.; Lillie, Ross C.