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1. Illinois, Galesburg quadrangle

Maps University Of Illinois Urbana Champaign Public content
1927. Geological Survey (U.S.). Surveyed in 1924-1925.;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.).

2. Illinois, Liberty quadrangle

Maps University Of Illinois Urbana Champaign Public content
1927. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1921-1922, and 1925.";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.).

3. Illinois, Streator quadrangle

Maps University Of Illinois Urbana Champaign Public content
1927. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1924 and 1925";Includes text on verso.;Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

4. Iowa-Illinois, Davenport sheet : reconnaissance map

Maps University Of Illinois Urbana Champaign Public content
1927. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1889.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).