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61. Illinois (Greene County), Roodhouse quadrangle.

Maps University Of Illinois Urbana Champaign Public content
1926. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1924";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.).

62. Illinois, Greenfield quadrangle

Maps University Of Illinois Urbana Champaign Public content
1932. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1928-1929.";Relief shown by contours and spot heights.;Shows highway classification as of 1932.;Text and ill... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

63. Illinois, Greenville quadrangle : 15-minute series

Maps University Of Illinois Urbana Champaign Public content
1943. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1928 and 1938-1939";Relief shown by contours and spot heights.;Shows roadway classification as of 1942.;1 ma... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

64. Illinois, Griggsville quadrangle

Maps University Of Illinois Urbana Champaign Public content
1926. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1921 and 1924";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.).

65. Illinois (Hancock County), Carthage quadrangle

Maps University Of Illinois Urbana Champaign Public content
1937. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1921-1922 and 1931-1933.";Relief shown by contours and spot heights.;Shows roadway classification as of 1936... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

66. Illinois Hardinville quadrangle : topography

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1910. Geological Survey (U.S.). Surveyed in 1907-1908.;"Surveyed in cooperation with the State of Illinois."; (W 88⁰00ʹ00ʺ--W 87⁰45ʹ00ʺ/N 39⁰00ʹ00ʺ--N 38⁰45ʹ00ʺ);Relief shown by c... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

67. 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.).

68. 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.).

69. Illinois (Henry County) Geneseo quadrangle

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1934. Geological Survey (U.S.). Surveyed in 1931 and 1932.; (W 90⁰15’00"--W 90⁰00’00"/N 41⁰30’00"--N 41⁰15’00");Culture and drainage in part compiled from aerial photographs taken... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

70. Illinois, Herrin quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1910. Geological Survey (U.S.). Surveyed in 1908.;"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot heights.;1 map, colored;45 x 36 cm.;1... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).