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Illinois Maps Topograp... (1)
Illinois Maps Topograp... (1)
Mason City (Ill.); Ill... (1)

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1. Mason City quadrangle, Illinois : 15 minute series (topographic) Mason City quadrangle, Illinois : 15 minute series (topographic) Mason City (Ill.); Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939-1940. Topography by plane-table methods 1947-1948."; Shows roadway classification as...

2. Illinois-Indiana, Carmi quadrangle : 15-minute series Illinois-Indiana, Carmi quadrangle : 15-minute series Illinois; Maps; Topographic maps; Topography; Carmi; Indiana Relief shown by contours and spot heights.; "Surveyed in 1921 and 1939-1940."; "Topography in Indiana from chart of the Wabash River by Corps of Engineers, U.S. Army."; "Contour interval 10 feet."; Coordinates:...

3. llinois, Greenup quadrangle : 15-minute series. llinois, Greenup quadrangle : 15-minute series. Illinois; Maps; Topographic maps; Topography; Greenup (Ill.) Relief shown by contours and spot heights.; "Surveyed in 1929 and 1939-1940"; "Contour interval 10 feet."; Shows roadway classification as of 1942.; Coordinates: (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 39⁰15ʹ00ʺ--N...
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