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Illinois Maps Topograp... (1)
Mount Olive (Ill.); Il... (1)

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1. Illinois, Mount Olive quadrangle : topography. Illinois, Mount Olive quadrangle : topography. Mount Olive (Ill.); Illinois; Maps; Topographic maps; Topography Relief indicated by contours and spot heights.; "Surveyed in 1913"; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."; Coordinates: (W 89⁰45ʹ00ʺ--W 89⁰30ʹ00ʺ/N...

2. 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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