University of Illinois Urbana-Champaign

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Showing 2041–2070 of 2,131 items
Thumbnail for Directory of Illinois mineral producers 1974
Directory of Illinois mineral producers 1974
Malhotra, Ramesh; Smith, Portia Allyn

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 Headwaters area assessment
Headwaters area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis

Thumbnail for Year-book for 1909
Year-book for 1909
Illinois State Geological Survey

Thumbnail for Chicago River/Lake Shore area assessment
Chicago River/Lake Shore area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis