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

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1. Kentucky-Illinois Golconda quadrangle : topography Kentucky-Illinois Golconda quadrangle : topography Illinois; Maps; Topographic maps; Topography; Golconda; Kentucky Relief shown by contours and spot heights.; "Surveyed in 1914, 1916 and 1920."; "Surveyed in cooperation with the States of Kentucky and Illinois."; "Contour interval 20 feet."; Coordinates: (W 88⁰30ʹ00ʺ--W...

2. Flora quadrangle, Illinois : 15 minute series (topographic) Flora quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Flora (Ill.) Relief shown by contours and spot heights.; "Contour interval 10 feet."; "Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods 1947-1948."; Coordinates:...
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