University of Illinois Urbana-Champaign

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Showing 421–450 of 664 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 Year-book for 1908
Year-book for 1908
Illinois State Geological Survey