| 1. |  | Illinois (Jo Daviess County), Elizabeth quadrangle : topography | Illinois; Maps; Topographic maps; Topography; Elizabeth (Ill.); Jo Daviess County (Ill.) | 1 map : col.; Relief indicated by contours and spot heights.; "Surveyed in 1909."; "Contour interval 20 feet."; "Surveyed in cooperation with the State of Illinois." |
