University of Illinois Urbana-Champaign

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Showing 1831–1860 of 2,858 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 Illinois mineral industry in 1943
Illinois mineral industry in 1943
Voskuil, Walter Henry; Stevens, Douglas F.

Thumbnail for Illinois mineral industry in 1942
Illinois mineral industry in 1942
Voskuil, Walter Henry; Stevens, Douglas F.