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891. Illinois, LaSalle sheet : reconnaissance map

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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.).

892. Illinois, Lena quadrangle : 15-minute series

Maps University Of Illinois Urbana Champaign Public content
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.).

893. Illinois, Liberty quadrangle

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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.).

894. Illinois (Logan County), Lincoln quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
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.).

895. Illinois, Mackinaw quadrangle

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1932. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1927-1928"; (W 89⁰30ʹ00ʺ--W 89⁰15ʹ00ʺ/N 40⁰45ʹ00ʺ--N 40⁰30ʹ00ʺ);Relief shown by contours and spot heights.;Sh... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

896. Illinois, Macomb quadrangle : topography.

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1914. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot heights.;1 map, colored;45 x ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

897. Illinois (Macoupin County), Carlinville quadrangle

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1925. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1923.";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.).

898. Illinois (Macoupin County) Gillespie quadrangle : topography

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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 Division (Urbana, Ill.), 1915. and U.S. Geological Survey (Washington, D.C.).

899. Illinois (Madison County), Edwardsville quadrangle

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1932. Geological Survey (U.S.). Contour interval 20 feet;"Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army.";"Surveyed in 1927";Relief s... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

900. Illinois, Mahomet quadrangle : topography

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1907. Geological Survey (U.S.). Surveyed in 1905.;"Surveyed in cooperation with the State of Illinois.";Includes diagram of township.;Relief shown by contours.;1 map, colored;45 x... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).