University of Illinois Urbana-Champaign

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Showing 6091–6120 of 6,597 items
Thumbnail for Illinois River Bluffs Area Assessment
Illinois River Bluffs Area Assessment
Illinois Department of Natural Resources

Thumbnail for The mineral content of Illinois waters
The mineral content of Illinois waters
Bartow, Edward; Parr, Samuel Wilson; Palmer, George Thomas; Udden, Johan August

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