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1. Rochelle quadrangle, Illinois : 15 minute series (topographic) Rochelle quadrangle, Illinois : 15 minute series (topographic) Rochelle (Ill.); Maps; Topographic maps; Topography; Illinois Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1951. Topography by plane-table surveys 1952"; "Contour interval 10 feet."

2. Erie quadrangle, Illinois : 15 minute series (topographic) Erie quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Erie (Ill.) Relief shown by contours and spot heights.; "Topography from aerial photographs by Kelsh plotter and by plane-table surveys 1952. Aerial photographs taken 1951"; "Contour interval 10 feet."

3. Le Roy quadrangle, Illinois : 15 minute series (topographic) Le Roy quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Le Roy (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1940. Topography by plane-table surveys 1930 and 1950-1951"; "Contour interval 10 feet."...

4. Sailor Springs quadrangle, Illinois : 15 minute series (topographic) Sailor Springs quadrangle, Illinois : 15 minute series (topographic) Sailor Springs (Ill.); Maps; Topographic maps; Topography; Illinois Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1953."; "Contour interval 10 feet."

5. Minier quadrangle, Illinois : 15 minute series (topographic) Minier quadrangle, Illinois : 15 minute series (topographic) Minier (Ill.); Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table methods 1930 and 1950-1951. Field check 1951"; "Contour...

6. Teutopolis quadrangle, Illinois : 15 minute series (topographic) Teutopolis quadrangle, Illinois : 15 minute series (topographic) Maps; Topographic maps; Topography; Illinois; Teutopolis (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1952-1953."; "Contour interval 10 feet."; Includes...

7. Amboy quadrangle, Illinois : 15 minute series (topographic) Amboy quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Amboy (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939 and 1941. Topography by plane-table surveys 1951."; "Contour interval 10 feet."

8. Earlville quadrangle, Illinois : 15 minute series (topographic) Earlville quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Earlville (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table surveys 1951."; "Contour interval 10 feet."; Coordinates:...

9. Mendota quadrangle, Illinois : 15 minute series (topographic). Mendota quadrangle, Illinois : 15 minute series (topographic). Mendota (Ill.); Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939, 1941 and 1951. Topography by plane-table surveys 1952"; "Contour interval 10 feet.";...
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