| 1. |  | Indiana-Illinois, Vincennes quadrangle : topography | Maps; Topographic maps; Topography; Illinois; Indiana; Vincennes (Ind.) | 1 map : col.; Relief shown by contours and spot heights.; "Surveyed in 1911-1913."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."; Coordinates: (W 87⁰45ʹ00ʺ--W... |