| 1. |  | Illinois, Tallula quadrangle : topography | Maps; Topographic maps; Topography; Illinois; Tallula (Ill.) | 1 map : col.; Relief indicated by contours and spot heights.; "Surveyed in 1906-1907."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 10 feet."; Coordinates: (W 90⁰00ʹ00ʺ--W... |
