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Illinois Maps Topograp... (1)
Mount Carroll (Ill.); ... (1)
Pecatonica (Ill.); Ill... (1)

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1. Illinois, Greenville quadrangle : 15-minute series Illinois, Greenville quadrangle : 15-minute series Illinois; Maps; Topographic maps; Topography; Greenville (Ill.) 1 map : col.; Relief shown by contours and spot heights.; "Surveyed in 1928 and 1938-1939"; "Contour interval 10 feet."; Shows roadway classification as of 1942.
2. Illinois-Wisconsin, Pecatonica quadrangle. Illinois-Wisconsin, Pecatonica quadrangle. Pecatonica (Ill.); Illinois; Wisconsin; Maps; Topographic maps; Topography 1 map : col.; "Contour interval 10 feet"; "Surveyed in 1915 and 1931-1932"; Shows roadway classification as of 1935.; Coordinates: (W 89⁰30’00"--W 89⁰15’00"/N 42⁰30’00"--N 42⁰15’00")
3. Illinois, Mt. Carroll quadrangle : 15-minute series. Illinois, Mt. Carroll quadrangle : 15-minute series. Mount Carroll (Ill.); Illinois; Maps; Topographic maps; Topography 1 map : col.; Relief shown by contours and spot heights.; "Surveyed in 1939, 1940, and 1942"; "Contour interval 20 feet"; Road classification as of 1943.
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