University of Illinois Urbana-Champaign

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Showing 2491–2520 of 45,296 items
Thumbnail for Rock River Area Assessment
Rock River Area Assessment
Illinois Department of Natural Resources

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 Coal resources of District VIII (Danville).
Coal resources of District VIII (Danville).
Kay, Fred Hall; White, Kessack Duke