1913. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed 1909 and 1911.";"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot hei... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1937. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army";"Surveyed in 1931-1932";Reli... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1912. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1910.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1896. Kace Publishing Company's, 1896 Illustrated Atlas of Black Hawk County, Iowa.; 1 atlas: b&w.; 39 x 45 cm. Material in the public domain. No restric... Kace Publishing Company.
1884. C.R. Allen & Co.'s 1884 Illustrated Atlas of Harrison County; 1 atlas: b&w.: 42 X 34 cm. Material in the public domain. No restrictions on use. Sta... C.R. Allen & Co.
1885. C. R. Allen, 1885, Illustrated Atlas of Pottawattamie County, Iowa; 1atlas: b&w.; 37 X 44 cm. Material in the public domain. No restrictions on use... C.R. Allen & Co.
1875. Andreas, A. T. (Alfred Theodore), 1839-1900. 1 map: col.; 45 x 38 cm Material in the public domain. No restrictions on use. Iowa. Dept. of Natural Resources. Geological Survey Bureau Cartograp... A.T. Andreas.
1918. Imogene
1910. Anderson Publishing Co.
1904. Huebinger, M. (Melchior). Iowa Publishing Co.
1919. Anderson Publishing Co.