Super XX; By USGS (GS-VDR-2-178,179); Scale 1:23,300
Creator
Geological Survey (U.S.)
Temporal Coverage
1954-03-21
Date Issued
1954.0
Rights
In Copyright - Educational Use Permitted, http://rightsstatements.org/vocab/InC-EDU/1.0/, Instructors are encouraged to download and print the images for classroom or laboratory instructional use. Please contact the Map Library with questions regarding reproduction for publication via e-mail (http://www.library.illinois.edu/mailform/mail.php?emailcode=mapandgeog) or by calling 217-333-0827.