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81. 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.).

82. Illinois, Hennepin sheet

Maps University Of Illinois Urbana Champaign Public content
1893. Geological Survey (U.S.). 1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).

83. Illinois (Henry County) Geneseo quadrangle

Maps University Of Illinois Urbana Champaign Public content
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.).

84. Illinois, Herrin quadrangle : topography

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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.).

85. Illinois, Herscher quadrangle

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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.).

86. Illinois Highwood quadrangle : topographic sheet

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1900. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1897.";Relief indicated 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.).

87. Illinois, Ina quadrangle : 15-minute series

Maps University Of Illinois Urbana Champaign Public content
1943. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1921, 1930, and 1937-1939."; (W 89⁰00ʹ00ʺ--W 88⁰45ʹ00ʺ/N 38⁰15ʹ00ʺ--N 38⁰00ʹ00ʺ);Relief shown by contours an... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

88. Illinois (Iroquois County), Cissna Park quadrangle

Maps 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.).

89. Illinois, Jacksonville quadrangle

Maps University Of Illinois Urbana Champaign Public content
1937. Geological Survey (U.S.). Surveyed in 1930-1932.;Contour interval 10 feet.;Lacks vegetation tint.;Relief shown by contours and spot heights.;Shows highway classification as ... Geological Survey (U.S.) and Geological Survey Division (Urbana Ill.).

90. Illinois, Jerseyville quadrangle

Maps University Of Illinois Urbana Champaign Public content
1933. Geological Survey (U.S.). Relief shown by contours and spot heights.;Road classification as of 1932.;1 map, colored;Contour interval 20 feet.;Surveyed in 1922, 1929, and 193... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).