Excerpt from The Dwight Mineralogical Zone of the Yorkville Till Member, Northeastern Illinois
This project originated from findings in areconnaissance study by J, P. Kempton, M. M. Killay.
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Secure The Dwight Mineralogical Zone Of The Yorkville Till Member, Northeastern Illinois (Classic Reprint) Crafted By Myrna M. Killey Presented As File
Myrna M. Killey