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241. llinois, Greenup quadrangle : 15-minute series.

Maps University Of Illinois Urbana Champaign Public content
1943. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1929 and 1939-1940"; (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 39⁰15ʹ00ʺ--N 39⁰00ʹ00ʺ);Relief shown by contours and spot h... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

242. Maroa quadrangle, Illinois : 15 minute series (topographic).

Maps University Of Illinois Urbana Champaign Public content
1958. Geological Survey (U.S.). Contour interval 10 feet.;"Topography from aerial photographs by Kelsh plotter and by planetable surveys 1956-1957. Aerial photographs taken 1956."... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

243. Mason City quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1963. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1939-1940. Topography by plane-table methods 1947-19... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

244. McLean quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1951. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1940-1941. Topography by plane-table methods, 1926, ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

245. Mechanicsburg quadrangle, Illinois : 15 minute series (topographic).

Maps University Of Illinois Urbana Champaign Public content
1955. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1950-1951. Topography by plane-table surveys 1954";R... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

246. Mendon quadrangle, Illinois-Missouri : 15 minute series (topographic).

Maps University Of Illinois Urbana Champaign Public content
1956. Geological Survey (U.S.). Contour interval 20 feet.;"Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods, 1946.";Reli... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Geological Survey and Water Resources (Rolla, Mo.).

247. Mendota quadrangle, Illinois : 15 minute series (topographic).

Maps University Of Illinois Urbana Champaign Public content
1954. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1939, 1941 and 1951. Topography by plane-table surve... Geological Survey (U.S.).

248. Minier quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1952. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table methods 1930 and 195... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

249. Minonk quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1956. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1948. Topography by plane-table surveys 1934-1935 an... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

250. Missouri-Illinois, Altenburg quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Control in part by Mississippi River Commission.;"Surveyed in 1915 and 1922.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.... Bureau of Geology and Mines (Rolla, Mo.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).