1957. Geological Survey (U.S.). Topography in Illinois from aerial photographs by Kelsh plotter, Aerial photographs taken 1956. Field check 1957, Topography in Indiana by planetab... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Indiana Dept. of Conservation (Indianapolis, Ind.).
Search Results
1946. Geological Survey (U.S.). (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 38⁰30ʹ00ʺ--N 38⁰15ʹ00ʺ);"Road classification 1945.";Relief shown by contours and spot heights.;1 map, colored;45 x 36 c... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1925. Geological Survey (U.S.). Surveyed in 1921 and 1923.;Relief shown by contours and spot heights.;Road classification "Dec.1924.";1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1932. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1928-1929.";Relief shown by contours and spot heights.;Road classification 1932.;1 map, colored;45 x 34 cm.;... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1940. Geological Survey (U.S.). Surveyed in 1930 and 1935.;Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1932. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1927 and 1929.";Relief shown by contours and spot heights.;Road classification 1932.;1 map, colored;45 x 34 ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1946. Geological Survey (U.S.). Mapped by the Geological Survey 1942-1943.;"Road classification 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.).
1915. Geological Survey (U.S.). Surveyed in 1911 and 1913.;Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1914. Geological Survey (U.S.). Surveyed in 1912.;Relief shown by contours and spot heights.;1 map, colored;45 x 36 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1923. Geological Survey (U.S.). Surveyed in 1919-1920.;Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).