University of Illinois Urbana-Champaign

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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.

Thumbnail for News from the Field
News from the Field
Submitter: Howard Ding

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Additional Content
Submitter: Howard Ding