1941. Geological Survey (U.S.). Contour interval 5 feet.;"Topography by Corps of Engineers...1930-39. Revised...1932, 1935 and 1939.";Relief shown by contours and spot heights.;1 ... U.S. Army, War College.
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1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1911 and 1913.";"Surveyed in cooperation with the States of Missouri and Illinois.";Relief shown by contours... Bureau of Geology and Mines (Rolla, Mo.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).
1932. Geological Survey (U.S.). Contour interval 20 feet.;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army.";"Surveyed in 1921 and 1928... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill).
1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1910 and 1914.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heig... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1933. Geological Survey (U.S.). Contour interval 20 feet;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army";"Surveyed in 1923 and 1927";... Bureau of Geology and Mines (Rolla, Mo.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).
1909. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1907.";"Surveyed in cooperation with the State of Missouri.";Relief shown by contours and spot heights.;1 ma... Bureau of Geology and Mines (Rolla, Mo.) and Geological Survey (U.S.).
1941. Geological Survey (U.S.). Contour interval 5 feet.;"Topography by Corps of Engineers...1930-39. Revised by Mississippi River Commission, 1932, 1935 and 1939.";Relief shown b... Army Map Service (U.S.).
1833. J. & C. Walker (Firm). Relief shown by hachures.;1 map, hand colored;20.5 x 35.4 cm.;ca. 1:1,750,000;C. Knight, 1846-51. -- vol. 2, no. 138. Charles Knight & Co. (London).
1925. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1903.";Relief shown by contours, spot heights and bathymetric soundings.;1 map, colored;45 x 70 cm.;1:62,500. Geological Survey (U.S.).
1838. Ensign, T., active 1838-1840, publisher, Hammond, John T., approximately 1820-, and Phelps, Humphrey,active 19th century,publisher. Counties shown in colors. Prime meridian : [Washington]. 'Entered according to act of Congress in the year 1836 by Humphrey Phelps & Bela S. Squire... Humphrey Phelps & T. Ensign,.