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1. Shawneetown quadrangle, Illinois-Kentucky : 15 minute series (topographic) Shawneetown quadrangle, Illinois-Kentucky : 15 minute series (topographic) Shawneetown; Kentucky; Maps; Topographic maps; Topography; Illinois Relief shown by contours and spot heights.; "Topography from aerial photographs by photogrammetric methods and by planetable surveys. Aerial photographs taken 1957"; "Contour interval 20 feet."; Coordinates:...

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:...
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