University of Illinois Urbana-Champaign

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Showing 151–180 of 8,266 items
Thumbnail for Illinois mineral industry in 1945
Illinois mineral industry in 1945
Voskuil, Walter Henry; Stevens, Douglas F.; Hamrick, Nina T.

Thumbnail for The classification of coal
The classification of coal
Parr, Samuel Wilson

Thumbnail for Geologic notes
Geologic notes
Jacobson, Russell J.; Trask, C. Brian; Palmer, James E.; Peppers, Russel A.; Nelson, W. John; Killey, Myrna M.; Lineback, Jerry A.

Thumbnail for Mineral industries of Illinois
Mineral industries of Illinois
Christensen, H.P.; Erb, E.