1960. Geological Survey (U.S.). Contour interval 20 feet.;"Topography from aerial photographs by photogrammetric methods and by planetable surveys. Aerial photographs taken 1957";... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Kentucky Geological Survey (Lexington, Ky.).
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1877. United States. Army. Corps of Engineers. Scale 1:15,840; Scale 1:15,840; 2 maps on 1 sheet : hand colored; 34 x 29 cm, sheet 40 x 35 cm Thomas, George H.(George Henry), 1816-1870. Office of the Chief of Engineers.
1927. United States. Bureau of Public Roads. Eastern sheet Includes inset continuation of northern Kentucky counties: Boone, Kenton and Campbell.; "Data corrected to Jan. 31, 1927."; "Approved... Bureau of Public Roads (Washington, D.C).
1927. United States. Bureau of Public Roads. Eastern sheet Includes inset continuation of northern Kentucky counties: Boone, Kenton and Campbell.; "Data corrected to Jan. 31, 1927."; "Approved... Bureau of Public Roads (Washington, D.C).
1912. Geological Survey (U.S.). Relief shown by contours and spot heights. 69 x 78 centimeters Scale 1:62,500 General Map Collection. U.S. Geological Survey (Washington, D.C).