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Illinois Maps Topograp... (1)
Illinois Maps Topograp... (1)
Illinois Maps Topograp... (1)

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1. Illinois, Galesburg quadrangle Illinois, Galesburg quadrangle Illinois; Maps; Topographic maps; Topography; Galesburg (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1924-1925."

2. Illinois, Gibson City quadrangle Illinois, Gibson City quadrangle Illinois; Maps; Topographic maps; Topography; Gibson City (Ill.) 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 1924-1925."; "Contour interval 10 feet."

3. Illinois, Brighton quadrangle Illinois, Brighton quadrangle Illinois; Maps; Topographic maps; Topography; Brighton (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1922 and 1924-1925."; Road classification "July. 1927."
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