University of Illinois Urbana-Champaign

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Showing 1861–1890 of 2,028 items
Thumbnail for Year-book for 1906
Year-book for 1906
Illinois State Geological Survey

Thumbnail for Mines in the Illinois portion of the Illinois-Kentucky Fluorspar District
Mines in the Illinois portion of the Illinois-Kentucky Fluorspar District
Denny, F. Brett; Nelson, W. John; Breeden, Jeremy R.; Lillie, Ross C.