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1. 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."

2. 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:...

3. 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."

4. Flanagan quadrangle, Illinois : 15 minute series (topographic) Flanagan quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Flanagan (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1951. Topography by planetable surveys 1957-1958."; Contour interval 10 feet.

5. 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.";...

6. Odell quadrangle, Illinois : 15 minute series (topographic). Odell quadrangle, Illinois : 15 minute series (topographic). Odel (Ill.); Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1951. Topography by planetable surveys 1957-1958."; Includes location map.
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