Contour interval 20 feet.;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army.";"Surveyed in 1924, 1928, 1929, and 1930.";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500
Creator:
Geological Survey (U.S.)
Publisher:
Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.)
The University of Illinois Map Library requests the following acknowledgement be included when using this Historical Map: Map provided courtesy of the Map Library at the University of Illinois at Urbana-Champaign.; No Copyright - United States; http://rightsstatements.org/vocab/NoC-US/1.0/