Contour interval 10 feet.;"Surveyed in 1921 and 1939-1940.";"Topography in Indiana from chart of the Wabash River by Corps of Engineers, U.S. Army."; (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 38⁰15ʹ00ʺ--N 38⁰00ʹ00ʺ);Relief shown by contours and spot heights.;1 map, colored;45 x 36 cm.;1:62,500