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Illinois Maps Topograp... (1)
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1. Missouri-Illinois, Charleston quadrangle : grid zone 'C' Missouri-Illinois, Charleston quadrangle : grid zone 'C' Illinois; Maps; Topographic maps; Topography; Charleston (Mo.); Missouri 1 map : col.; Relief shown by contours and spot heights.; "Topography by Corps of Engineers...1930-39. Revised...1932, 1935 and 1939."; "Contour interval 5 feet."
2. Iowa-Illinois, East Dubuque quadrangle Iowa-Illinois, East Dubuque quadrangle Illinois; Maps; Topographic maps; Topography; East Dubuque; Iowa 1 map : col.; Relief shown by contours and spot heights.; "Surveyed in 1935"; "Contour interval 20 feet."
3. Illinois, Chandlerville quadrangle Illinois, Chandlerville quadrangle Illinois; Maps; Topographic maps; Topography; Chandlerville (Ill.) 1 map : col.; Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army."; "Surveyed in 1924, 1928, 1929, and 1930."; "Contour...
4. Iowa-Illinois Miles quadrangle Iowa-Illinois Miles quadrangle Miles; Iowa; Illinois; Maps; Topographic maps; Topography 1 map : col.; Relief shown by contours and spot heights.; "Surveyed in 1935."; "Contour interval 20 feet."; Shows roadway classification as of 1940.
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