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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. Illinois, Equality quadrangle : topography Illinois, Equality quadrangle : topography Illinois; Maps; Topographic maps; Topography; Equality (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1913-1914."; "Contour interval 20 feet."; "Surveyed in cooperation with the State of Illinois."; Coordinates (W 88⁰30’00"--W 88⁰15’00"/N...

3. 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:...

4. Illinois-Missouri, Campbell Hill quadrangle : topography Illinois-Missouri, Campbell Hill quadrangle : topography Illinois; Maps; Topographic maps; Topography; Campbell Hill; Missouri Relief shown by contours and spot heights.; "Surveyed in 1915-1916."; "Surveyed in cooperation with the States of Illinois and Missouri."; "Contour interval 20 feet."; Coordinates: (W 89⁰45ʹ00ʺ--W...
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