Geological Survey (U.S.)Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1938-1939. Topography by plane-table methods 1949-1950.";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500JPEG2000https://digital.library.illinois.edu/items/904f5e60-82d4-0134-1f08-0050569601ca-fengGeological Survey (U.S.)Geological Survey Division (Urbana, Ill.)PublicEffingham quadrangle, Illinois : 15 minute series (topographic)MapsIllinois1951University of Illinois Urbana-Champaign