The Platteville and Galena group in northern Illinois /

Bibliographic Details
Main Author:	Willman, H. B. (Harold Bowen), 1901-
Other Authors:	Kolata, Dennis R.
Format:	Book
Language:	English
Published:	Urbana : Illinois State Geological Survey, 1978.
Series:	Circular (Illinois State Geological Survey) ; 502.
Subjects:	Geology, Stratigraphic > Ordovician. Geology > Illinois.

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