| 1. |  | Hutsonville quadrangle, Illinois-Indiana : 15 minute series (topographic) | Illinois; Maps; Topographic maps; Topography; Hutsonville; Indiana | 1 map : col.; Relief shown by contours and spot heights.; "Topography in Illinois from aerial photographs by Kelsh plotter, Aerial photographs taken 1956. Field check 1957, Topography in Indiana by planetable... |
