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

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1. Illinois, Galva quadrangle : 15-minute series Illinois, Galva quadrangle : 15-minute series Illinois; Maps; Topographic maps; Topography; Galva (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1930-1931 and 1940."; "Contour interval 10 feet."; Road classification as of 1943.

2. Illinois, Fithian quadrangle : 15-minute series Illinois, Fithian quadrangle : 15-minute series Illinois; Maps; Topographic maps; Topography; Fithian (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1930-1931 and 1939."; "Contour interval 10 feet."
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