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1. Erie quadrangle, Illinois : 15 minute series (topographic) Erie quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Erie (Ill.) Relief shown by contours and spot heights.; "Topography from aerial photographs by Kelsh plotter and by plane-table surveys 1952. Aerial photographs taken 1951"; "Contour interval 10 feet."

2. Sailor Springs quadrangle, Illinois : 15 minute series (topographic) Sailor Springs quadrangle, Illinois : 15 minute series (topographic) Sailor Springs (Ill.); Maps; Topographic maps; Topography; Illinois Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1953."; "Contour interval 10 feet."

3. Teutopolis quadrangle, Illinois : 15 minute series (topographic) Teutopolis quadrangle, Illinois : 15 minute series (topographic) Maps; Topographic maps; Topography; Illinois; Teutopolis (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1952-1953."; "Contour interval 10 feet."; Includes...
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