University of Illinois Urbana-Champaign

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Showing 7861–7890 of 8,882 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 1907.
Year-book for 1907.
Illinois State Geological Survey