University of Illinois Urbana-Champaign

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Showing 3061–3090 of 3,508 items
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

Thumbnail for Geology of the fluorspar deposits of Illinois
Geology of the fluorspar deposits of Illinois
Weller, James Marvin; Grogan, Robert Mann; Tippie, Frank Emerson, joint author

Thumbnail for Illinois Technograph v. 070 (1954-1955)
Illinois Technograph v. 070 (1954-1955)
Submitter: Timothy Donohue