University of Illinois Urbana-Champaign

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Showing 391–420 of 875 items
Thumbnail for Ste. Genevieve fault zone, Missouri and Illinois
Ste. Genevieve fault zone, Missouri and Illinois
Nelson, W. John; Lumm, Donald K.; Schwalb, Howard R.

Thumbnail for Oil investigations in Illinois in 1916, under direction of Fred H. Kay.
Oil investigations in Illinois in 1916, under direction of Fred H. Kay.
Illinois State Geological Survey; Kay, Fred Hall; Brokaw, Albert Dudley; St. Clair, Stuart; Butts, Charles