Illinois State Geological Survey - the Next Quarter Century
Presented to the Geology and Geography Section, Illinois State Academy of Science meeting, Lisle, Illinois, on the occasion of the 75th anniversary of the Illinois State Geological Survey;
April 19, 1980;
Manuscripts, maps, fieldnotes, and photographs may be viewed in-house only. Please contact the ISGS Special Collections Curator, Anne Huber, for an appointment at 217-300-0005 or email firstname.lastname@example.org Monday thru Friday, 8am-noon or 1pm-5pm.