University of Illinois Urbana-Champaign

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Showing 1951–1980 of 4,048 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 Mineral industries of Illinois
Mineral industries of Illinois
Christensen, H.P.; Erb, E.