University of Illinois Urbana-Champaign

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Showing 121–150 of 1,886 items
Thumbnail for Availability of the Springfield Coal for mining in Illinois
Availability of the Springfield Coal for mining in Illinois
Treworgy, Colin G.; Korose, Christopher P.; Chenoweth, Cheri A.; North, Daniel L.

Thumbnail for The abundance of zinc and cadmium in sphalerite-bearing coals in Illinois
The abundance of zinc and cadmium in sphalerite-bearing coals in Illinois
Cobb, James C.; Steele, John D.; Treworgy, Colin G.; Ashby, Jim F.

Thumbnail for Roof strata of the Herrin (no. 6) coal member in mines of Illinois : their geology and stability
Roof strata of the Herrin (no. 6) coal member in mines of Illinois : their geology and stability
Krausse, Hans Friedrich; Damberger, H.H.; Nelson, W.J.; Hunt, Stephen R.; Ledvina, C.T.; Treworgy, C.G.; White, W.A.