The Dwight mineralogical zone of the Yorkville Till Member, northeastern Illinois /
Myrna M. Killey.
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Item Link | Original Source |
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Limited (search only) | University of Illinois at Urbana-Champaign |
Limited (search only) | University of Illinois at Urbana-Champaign |
Limited (search only) Information circular / Illinois State Geological Survey ; [no. 526] | University of Illinois at Urbana-Champaign |