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

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1. Illinois-Wisconsin, Pecatonica quadrangle. Illinois-Wisconsin, Pecatonica quadrangle. Pecatonica (Ill.); Illinois; Wisconsin; Maps; Topographic maps; Topography "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")

2. Earlville quadrangle, Illinois : 15 minute series (topographic) Earlville quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Earlville (Ill.) Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table surveys 1951."; "Contour interval 10 feet."; Coordinates:...
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