Geography of the upper Illinois Valley and history of development
By: by Carl Ortwin Sauer. Printed by authority of the state of Illinois.
Series: Illinois. State geological survey. Bulletin -- no. 27; Bulletin (Illinois State Geological Survey) -- no. 27.
Publisher: Illinois state geological survey, University of Illinois
Published: 1916
Place of publication: Urbana
Language: eng
Number of pages: 208
Subjects: Geology -- Illinois.