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.).
Search Results
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1917.";"Surveyed in cooperation with the War Department and the State of Illinois.";Relief shown by contours... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and War Dept., Corps of Engineers, U.S. Army (U.S.).
1943. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1930 and 1941";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.).
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1912.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).
1893. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1891.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).
1908. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1891.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. U.S. Geological Survey (U.S.).
1943. Geological Survey (U.S.). Relief shown by contours and spot heights.;Shows roadway classification as of 1942.;"Contour interval 20 feet";"Surveyed in 1909, 1922, 1936, 1937 ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1927. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1921-1922, and 1925.";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.).
1913. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1911.";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.).