University of Illinois Urbana-Champaign

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Showing 4261–4290 of 8,237 items
Thumbnail for Directory of Illinois mineral producers, and maps of extraction sites 1997
Directory of Illinois mineral producers, and maps of extraction sites 1997
Masters, John M.; Ipe, Viju C.; Smith, Lisa R.; Falter, Michael

Thumbnail for Grand Tower limestone (Devonian) of southern Illinois
Grand Tower limestone (Devonian) of southern Illinois
Meents, Wayne Franklin; Swann, David Henry joint author