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Start Over Year 1940 Format JPEG2000 Bounding Box -86.51116 39.149274 -86.508949 39.150938

1. Illinois, Arcola quadrangle

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Surveyed in 1930 and 1935.;Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

2. Illinois (Iroquois County), Cissna Park quadrangle

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1939.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).

3. Illinois, Morrison quadrangle

University Of Illinois Urbana Champaign Public content
1940. 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 and 1933-... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

4. Illinois, Mount Vernon quadrangle.

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1928, 1930, 1932, and 1933";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

5. Illinois, Sullivan quadrangle

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1930 and 1935.";Relief shown by contours.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

6. Illinois-Iowa, Oquawka quadrangle.

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Contour intervals 10 and 20 feet changing on the 580 foot contour.;"Culture and drainage in part compiled from aerial photographs taken by Air Corp... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

7. Iowa-Illinois, Burlington quadrangle : topography

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army.;"Surveyed in 1934.";Relief shown by contours and spot ... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

8. Iowa-Illinois, East Dubuque quadrangle

University Of Illinois Urbana Champaign Public content
1940. Geological Survey (U.S.). Surveyed in 1935;Contour interval 20 feet.;Relief shown by contours and spot heights.;1 map, colored;46 x 34 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).