| 1. |  | Paxton quadrangle, Illinois : 15 minute series (topographic). | Paxton (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 1954. Topography by planetable surveys 1924, Revised 1956-1957"; "Contour... |
