1934. Geological Survey (U.S.). Surveyed in 1931 and 1932.; (W 90⁰15’00"--W 90⁰00’00"/N 41⁰30’00"--N 41⁰15’00");Culture and drainage in part compiled from aerial photographs taken... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1934. Geological Survey (U.S.). Surveyed in 1922, 1924, 1925 and 1927.;Relief shown by contours and spot heights.;Road classification, 1932.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1934. Geological Survey (U.S.). 1 map, colored;Contour intervals 5 and 20 feet.;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army";"Surv... War Dept., Corps of Engineers, U.S. Army (U.S.), Geological Survey Division (Urbana, Ill.), and Geological Survey (U.S.).