1952. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table surveys 1951."; (W 8... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1957. Geological Survey (U.S.). Culture and drainage in part compiled from aerial photographs taken 1953. Topography by planetable surveys 1955-1956.;Contour interval 20 feet.;Rel... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1951. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1938-1939. Topography by plane-table methods 1949-195... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).