- Geological Survey (U.S.)
- University of Illinois at Urbana-Champaign, University Library
Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods, 1946."; "Contour interval 20 feet. 45 x 37 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Geological Survey Division (Urbana, Ill.); Geological Survey and Water Resources (Rolla, Mo.).