• Creator
  • Geological Survey (U.S.)
  • Created Date
  • 1934-1934
  • Description
  • Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army."; "Surveyed in 1931 and 1932."; Contour interval 10 feet. Coordinates: (W 90⁰15’00"--W 90⁰00’00"/N 41⁰30’00"--N 41⁰15’00"). 45 x 34 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Geological Survey Division (Urbana, Ill.).