Browse Illinois State Geological Survey (ISGS) by Contributor "Berg, Richard C."
Now showing items 1-2 of 2
Illinoian and Wisconsinan stratigraphy and environments in northern Illinois : the Altonian revised (Champaign Ill. : Illinois Dept. of Energy and Natural Resources, State Geological Survey Division,, 1985)
(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute, 2018)