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Start Over Provider University of Illinois Urbana-Champaign Bounding Box -180 -89.81531 180 89.456192

2121. Illinois-Iowa Galena quadrangle : topography

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1913. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed 1909 and 1911.";"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot hei... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2122. Illinois-Iowa, Keithsburg quadrangle

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1941. Geological Survey (U.S.). Contour intervals 10 and 20 feet changing on the 580 foot contour.;"Culture and drainage in part compiled from aerial photographs taken by Air Corp... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2123. Illinois-Iowa, Lomax quadrangle

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1937. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army";"Surveyed in 1931-1932";Reli... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2124. Illinois-Iowa, Milan quadrangle : topography.

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1912. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1910.";"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.).

2125. Illinois-Iowa, Oquawka quadrangle.

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1940. Geological Survey (U.S.). Contour intervals 10 and 20 feet changing on the 580 foot contour.;"Culture and drainage in part compiled from aerial photographs taken by Air Corp... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2126. Illinois-Iowa-Missouri, Keokuk quadrangle

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1936. Geological Survey (U.S.). Contour intervals 10 and 20 feet changing on the 500 foot contour;"Culture and drainage in part compiled from aerial photographs taken by Air Corps... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2127. Illinois-Kentucky, Brownfield quadrangle : topography

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1917. Geological Survey (U.S.). Surveyed in 1914-1915.;"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 map, colored;45 x 36 cm.;... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2128. Illinois-Kentucky-Missouri, Cairo quadrangle

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1933. Geological Survey (U.S.). Contour interval 5 and 20 feet.;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army.";"Missouri part surve... Bureau of Mineral and Topographic Survey (Lexington, Ky.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).

2129. Illinois-Missouri, Alto Pass quadrangle

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1924. Geological Survey (U.S.). Surveyed in 1921 and 1922.;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.).

2130. Illinois-Missouri, Alton quadrangle

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1934. Geological Survey (U.S.). Surveyed in 1922, 1924, 1925 and 1927.;Relief shown by contours and spot heights.;Road classification, 1932.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).