University of Illinois Urbana-Champaign

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Showing 8491–8520 of 13,618 items
Thumbnail for Contributions to the study of coal
Contributions to the study of coal
Illinois State Geological Survey; Thiessen, Gilbert; Cady, Gilbert H.; Rees, Orin Wainwright; Reed, Frank Hynes

Thumbnail for The geology of Hardin County, and the adjoining part of Pope County.
The geology of Hardin County, and the adjoining part of Pope County.
Weller, Stuart; Butts, Charles; Currier, Louis W.; Salisbury, Rollin D.