University of Illinois Urbana-Champaign

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Showing 2431–2460 of 3,536 items
Thumbnail for Washability tests of Illinois coals
Washability tests of Illinois coals
Callen, Alfred Copeland; Mitchell, David Ray

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