The glacial boundary in southern Illinois /
H.B. Willman and John C. Frye.

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Main Author
Willman, H. B. (Harold Bowen), 1901-
Related Names
Frye, John Chapman, 1912-
Illinois State Geological Survey.
Language(s)
English
Published
[Chicago] : Illinois Institute of Natural Resources ; 1980.
Subjects
Glacial epoch > Illinois.
Physical Description
23 p. : maps ; 28 cm.
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Limited (search only)   University of Illinois at Urbana-Champaign
Limited (search only)   University of California
Limited (search only)   Information circular / Illinois State Geological Survey ; [no. 511] University of Illinois at Urbana-Champaign