1947. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey 1945";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1939. Geological Survey (U.S.). Shows roadway classification as of 1938.;"Contour interval 10 feet.";"Surveyed in 1934-1935.";Relief shown by contours and spot heights.;1 map, col... Geological Survey (U.S.).
1906. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1905.";"Surveyed in cooperation with the States of Illinois and Kentucky.";Relief shown by contours and spot... Geological Survey (Lexington, Ky.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).
1903. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1901.";Includes "diagram of township.";Relief indicated by contours and spot heights.;1 map, colored;45 x 36... Geological Survey (U.S.).
1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1911-1913.";"Surveyed in cooperation with the State of Illinois."; (W 87⁰45ʹ00ʺ--W 87⁰30ʹ00ʺ/N 38⁰45ʹ00ʺ--N ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill).
1949. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods 1947.";Relief... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).