University of Illinois Urbana-Champaign

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Showing 7111–7140 of 7,368 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 Development of paleobotany in the Illinois Basin
Development of paleobotany in the Illinois Basin
Phillips, Tom Lee; Pfefferkorn, Hermann W.; Peppers, Russel A.