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|Open File Series 1988-3 map|
|Title:||Middle Devonian and deeper tests in Illinois from the Devonian and deeper file (not complete for northern Illinois)|
|Author(s):||Treworgy, Janis D.|
|Publisher:||Illinois State Geological Survey, Department of Natural Resources|
|Series/Report:||Open File Series 1988-03|
|Date Available in IDEALS:||2014-10-10|