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

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1. Illinois, Lena quadrangle : 15-minute series Illinois, Lena quadrangle : 15-minute series Illinois; Maps; Topographic maps; Topography; Lena (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1909, 1922, 1936, 1937 and 1942"; "Contour interval 20 feet"; Shows roadway classification as of 1942.; Coordinates: (W 90⁰00ʹ00ʺ--W 89⁰45ʹ00ʺ/N...

2. Indiana-Illinois, Vincennes quadrangle : topography Indiana-Illinois, Vincennes quadrangle : topography Maps; Topographic maps; Topography; Illinois; Indiana; Vincennes (Ind.) Relief shown by contours and spot heights.; "Surveyed in 1911-1913."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."; Coordinates: (W 87⁰45ʹ00ʺ--W 87⁰30ʹ00ʺ/N...

3. Illinois, Colchester quadrangle : topography Illinois, Colchester quadrangle : topography Illinois; Maps; Topographic maps; Topography; Colchester (Ill.) Relief shown by contours.; "Contour interval 20 feet."; "Surveyed in 1911."; Coordinates: (W 91⁰00ʹ00ʺ--W 90⁰45ʹ00ʺ/N 40⁰30ʹ00ʺ--N 40⁰15ʹ00ʺ)
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