| 1. |  | Minonk quadrangle, Illinois : 15 minute series (topographic) | Minonk (Ill.); Illinois; Maps; Topographic maps; Topography | 1 map : col.; Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1948. Topography by plane-table surveys 1934-1935 and 1954-1955"; "Contour... |
