University of Illinois Urbana-Champaign

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Showing 1–30 of 1,345 items
Thumbnail for Surface coal mine : major coals of the Carbondale Formation
Surface coal mine : major coals of the Carbondale Formation
Krausse, Hans Friedrich; Cobb, James C.; Treworgy, Colin G.

Thumbnail for Abundance and recovery of sphalerite and fine coal from mine waste in Illinois
Abundance and recovery of sphalerite and fine coal from mine waste in Illinois
Cobb, James C.; Masters, John M.; Treworgy, Colin G.; Helfinstine, Roy John

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 Maps and Scholars
Maps and Scholars
Cobb, David A.