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1. Illinois, Dixon quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"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.).

2. Illinois, Good Hope quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"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.).

3. Illinois, Kings quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1917.";"Surveyed in cooperation with the War Department and the State of Illinois.";Relief shown by contours... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and War Dept., Corps of Engineers, U.S. Army (U.S.).

4. Illinois, Kirkland quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1917.";"Surveyed in cooperation with the War Department and the State of Illinois.";Relief shown by contours... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and War Dept., Corps of Engineers, U.S. Army (U.S.).

5. Illinois, La Harpe quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"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.).

6. Illinois, Morris quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1915.";"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.).

7. Illinois, Wilmington quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey Division (Urbana, Ill.) and Geological Survey (U.S.).

8. Illinois-Missouri, Campbell Hill quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1915-1916.";"Surveyed in cooperation with the States of Illinois and Missouri."; (W 89⁰45ʹ00ʺ--W 89⁰30ʹ00ʺ/N... Geological Survey Division (Urbana, Ill.), State of Missouri Bureau of Geology and Mines (Rolla, Mo.), and Geological Survey (U.S.).

9. Illinois-Wisconsin, Belvidere quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Surveyed in 1917.;Surveyed in cooperation with the War Department and the State of Illinois.";Relief shown by contours and spot heights.;1 map, col... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

10. Illinois-Wisconsin (Winnebago County), Rockford quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1917.";"Surveyed in cooperation with the War Department and the State of Illinois.";Relief shown by contours... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and War Dept., Corps of Engineers, U.S. Army (U.S.).