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  1. 1
    Geologic map of the Stonefort quadrangle, Illinois /
    by Nelson, W. John, Nelson, W. John
    Published 1990

    Map
  2. 2
    Geologic map of the Creal Springs quadrangle, Illinois /
    by Trask, C. Brian, Trask, C. Brian
    Published 1990

    Map
  3. 3
    Geologic map of the Rudement quadrangle, Saline County, Illinois /
    by Nelson, W. John, Nelson, W. John
    Published 1986

    Map
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