1939. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1933-1934.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1939. Geological Survey (U.S.). Shows roadway classification as of 1938.;"Contour interval 10 feet.";"Surveyed in 1934-1935.";Relief shown by contours and spot heights.;1 map, col... Geological Survey (U.S.).