University of Illinois Urbana-Champaign

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Showing 481–510 of 13,703 items
Thumbnail for Studies of the Chester series in the Illinois basin.
Studies of the Chester series in the Illinois basin.
Illinois State Geological Survey; Cohee, George Vincent; Cooper, Chalmer L.; Tippie, Frank E.

Thumbnail for Bibliotheken
Bibliotheken
Körtum, Albert; Schmidt, Eduard; Garver, Willia Kathryn

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