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1. Illinois-Iowa, Edgington quadrangle : topography Illinois-Iowa, Edgington quadrangle : topography Illinois; Maps; Topographic maps; Topography; Edgington; Iowa Relief shown by contours and spot heights.; "Surveyed in 1913."; "Contour interval 20 feet."; "Surveyed in cooperation with the State of Illinois."

2. Atlas of the State of Illinois to which are added various general maps, history, statistics and illustrations. Atlas of the State of Illinois to which are added various general maps, history, statistics and illustrations. Real property--Illinois--maps; Biography; History

3. Illinois-Iowa, Milan quadrangle : topography. Illinois-Iowa, Milan quadrangle : topography. Milan (Ill.); Iowa; Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Surveyed in 1910."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."

4. Illinois-Iowa Galena quadrangle : topography Illinois-Iowa Galena quadrangle : topography Illinois; Maps; Topographic maps; Topography; Galena (Ill.); Iowa Relief indicated by contours and spot heights.; "Surveyed 1909 and 1911."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."

5. Illinois, Galatia quadrangle : topography Illinois, Galatia quadrangle : topography Illinois; Maps; Topographic maps; Topography; Iowa; Galatia (Ill.) Relief indicated by contours and spot heights.; "Surveyed in 1906."; "Surveyed in cooperation with the State of Illinois.; "Contour interval 20 feet."

6. Illinois-Iowa, Lomax quadrangle Illinois-Iowa, Lomax quadrangle Illinois; Maps; Topographic maps; Topography; Lomax; Iowa Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army"; "Surveyed in 1931-1932"; "Contour interval 10 feet"; Shows roadway...

7. Iowa-Illinois, East Dubuque quadrangle Iowa-Illinois, East Dubuque quadrangle Illinois; Maps; Topographic maps; Topography; East Dubuque; Iowa Relief shown by contours and spot heights.; "Surveyed in 1935"; "Contour interval 20 feet."

8. Iowa-Illinois, Savanna sheet : reconnaissance map Iowa-Illinois, Savanna sheet : reconnaissance map Savanna (Ill.); Iowa; Maps; Topographic maps; Topography; Illinois Relief shown by contours.; "Surveyed in 1890."; "Contour interval 20 feet."

9. Iowa-Illinois, Fort Madison quadrangle Iowa-Illinois, Fort Madison quadrangle Illinois; Maps; Topographic maps; Topography; Iowa; Fort Madison Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army."; "Contour interval 20 feet."; "Surveyed in 1928 and 1933."; Shows...

10. Iowa-Illinois Miles quadrangle Iowa-Illinois Miles quadrangle Miles; Iowa; Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Surveyed in 1935."; "Contour interval 20 feet."; Shows roadway classification as of 1940.

11. Iowa-Illinois, Muscatine quadrangle : 15-minute series. Iowa-Illinois, Muscatine quadrangle : 15-minute series. Muscatane (Ill.); Iowa; Illinois; Maps; Topographic maps; Topography Relief shown by contours and spot heights.; "Mapped by the Geological Survey 1946"; "Contour interval 20 feet."; Shows roadway classification as of 1947.; Coordinates: (W 91⁰15ʹ00ʺ--W 91⁰00ʹ00ʺ/N...

12. Iowa-Illinois, Burlington quadrangle : topography Iowa-Illinois, Burlington quadrangle : topography Illinois; Maps; Topographic maps; Topography; Burlington; Iowa Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army."; "Surveyed in 1934."

13. Illinois-Iowa, Keithsburg quadrangle Illinois-Iowa, Keithsburg quadrangle Illinois; Maps; Topographic maps; Topography; Keithsburg; Iowa Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army."; "Surveyed in 1921, 1931, 1934, and 1935"; "Contour intervals...
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