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Illinois Maps Topograp... (1)
Illinois Maps Topograp... (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.) Relief shown by contours and spot heights.; "Surveyed in 1928 and 1938-1939"; "Contour interval 10 feet."; Shows roadway classification as of 1942.

2. Effingham quadrangle, Illinois : 15 minute series (topographic) Effingham quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Effingham (Ill.) Relief shown by contours and spot heights.; "Contour interval 10 feet"; "Culture and drainage in part compiled from aerial photographs taken 1938-1939. Topography by plane-table methods 1949-1950."
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