Glacial tills of Northwestern Illinois /

Bibliographic Details
Corporate Author:	Illinois State Geological Survey
Other Authors:	Frye, John C., (John Chapman), 1912-1982
Format:	Book
Language:	English
Published:	Urbana, [publisher not identified] ; 1969.
Series:	Circular (Illinois State Geological Survey) ; 437.
Subjects:	Drift > Illinois.

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