(W 88⁰45ʹ00ʺ--W 88⁰30ʹ00ʺ/N 39⁰30ʹ00ʺ--N 39⁰15ʹ00ʺ);"Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table methods 1935 and 1947";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500