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1. Illinois, Alexis quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Surveyed in 1921 and 1923.;Relief shown by contours and spot heights.;Road classification "Dec.1924.";1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2. Illinois, Elgin quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1923";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

3. Illinois, Harrisburg quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1921 and 1923.";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.).

4. Illinois, Havana quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). (W 90⁰15ʹ00ʺ--W 90⁰00ʹ00ʺ/N 40⁰30ʹ00ʺ--N 40⁰15ʹ00ʺ);"Control in part by Illinois River Commission and Corps of Engineers U.S. Army.";"Surveyed in 1... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

5. Illinois, Herscher quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Control in part from railroad valuation surveys.;"Surveyed in 1922 and 1923.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

6. Illinois (Macoupin County), Carlinville quadrangle

Maps University Of Illinois Urbana Champaign Public content
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.).

7. Illinois, Marion Quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1923.";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.).

8. Illinois, Raymond quadrangle.

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1922-1923.";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.).

9. Illinois, Taylorville quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Relief shown by contours and spot heights.;"Surveyed in 1922-1923.";Contour interval 10 feet.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey Division (Urbana, Ill.) and Geological Survey (U.S.).

10. Illinois, Yorkville quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1923.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

11. Missouri-Illinois, Altenburg quadrangle

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Control in part by Mississippi River Commission.;"Surveyed in 1915 and 1922.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.... Bureau of Geology and Mines (Rolla, Mo.), Geological Survey (U.S.), and Geological Survey Division (Urbana, Ill.).

12. Saint Louis quadrangle, Missouri-Illinois

Maps University Of Illinois Urbana Champaign Public content
1925. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1903.";Relief shown by contours, spot heights and bathymetric soundings.;1 map, colored;45 x 70 cm.;1:62,500. Geological Survey (U.S.).