| 1. |  | Missouri-Illinois, St. Charles quadrangle | Maps; Topographic maps; Topography; Illinois; Missouri; Saint Charles (Mo.); St. Charles (Mo.) | 1 map : col.; Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army"; "Surveyed in 1923 and 1927"; "Contour interval 20... |