Glacial tills of Northwestern Illinois
By: [by] John C. Frye [and others]
Contributors: Frye, John Chapman, 1912-
Series: Circular; 437; Circular (Illinois State Geological Survey) ;; 437.
Published: 1969
Place of publication: Urbana
Language: eng
Number of pages: 45
Subjects: Drift -- Illinois
Notes: Bibliography: p. 28-31.
Cover title.