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2. American Central Railway.

Maps University Of Illinois Urbana Champaign Public content
1866. American Central Railway Company. Relief shown using hachures.;1 map, colored;40 x 115 cm.;ca. 1:1,200,000. J. Bien (New York).

7. Illinois, Missouri & Iowa, 1864

Maps University Of Iowa Public content
1860. Wells, J. 1 color map 26 x 21 cm Scale [ca. 1:3,900,000] W 96°--W 87°/N 44°--N 35°. A.S. Barnes & Burr.

8. Illinois-Iowa, Edgington quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1913.";"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.).

9. Illinois-Iowa Galena quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
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.).

10. Illinois-Iowa, Lomax quadrangle

Maps University Of Illinois Urbana Champaign Public content
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.).