| 1. |  | Arrowsmith quadrangle, Illinois : 15 minute series (topographic) | Illinois; Maps; Topographic maps; Topography; Arrowsmith (Ill.) | 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, 1930 and 1951-1952." Includes quadrangle... |
