University of Illinois Urbana-Champaign

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Showing 61–90 of 341 items
Thumbnail for Illinois mineral industry in 1942
Illinois mineral industry in 1942
Voskuil, Walter Henry; Stevens, Douglas F.

Thumbnail for Ste. Genevieve fault zone, Missouri and Illinois
Ste. Genevieve fault zone, Missouri and Illinois
Nelson, W. John; Lumm, Donald K.; Schwalb, Howard R.

Thumbnail for Illinois mineral industry in 1943
Illinois mineral industry in 1943
Voskuil, Walter Henry; Stevens, Douglas F.

Thumbnail for Illinois mineral industry in 1945
Illinois mineral industry in 1945
Voskuil, Walter Henry; Stevens, Douglas F.; Hamrick, Nina T.