The glacial boundary in southern Illinois /

Bibliographic Details
Main Author:	Willman, H. B. (Harold Bowen), 1901-1955
Other Authors:	Frye, John C., (John Chapman), 1912-1982
Format:	Book
Language:	English
Published:	Urbana, Ill. : Illinois Institute of Natural Resources, Illinois State Geological Survey Division, 1980.
Series:	Circular (Illinois State Geological Survey) ; 511.
Subjects:	Glacial epoch > Illinois.

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