• Creator
  • Geological Survey (U.S.)
  • Created Date
  • 1910-1910
  • Description
  • Relief indicated by contours and spot heights.; "Surveyed in 1908."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet. 45 x 36 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); [Urbana, Ill.] : State Geological Survey (Urbana, Ill.).