Unpublished reports on open file IV
Subtitle: stratigraphy and areal geology
By: by Lois S. Kent
Series: Illinois State Geological Survey. Circular -- no. 220; Circular (Illinois State Geological Survey) -- no. 220.
Publisher: Illinois State Geological Survey
Published: 1956
Place of publication: Urbana
Language: eng
Number of pages: 19
Subjects: Mineral files; Bibliography; Geology
Other titles: Stratigraphy and areal geology.