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161. Illinois, La Harpe quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1918. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

162. Illinois (La Salle County), Ottawa quadrangle : topography.

Maps University Of Illinois Urbana Champaign Public content
1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1912.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).

163. Illinois, Lacon sheet

Maps University Of Illinois Urbana Champaign Public content
1893. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1891.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).

164. Illinois, LaSalle sheet : reconnaissance map

Maps University Of Illinois Urbana Champaign Public content
1908. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1891.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. U.S. Geological Survey (U.S.).

165. Illinois, Lena quadrangle : 15-minute series

Maps University Of Illinois Urbana Champaign Public content
1943. Geological Survey (U.S.). Relief shown by contours and spot heights.;Shows roadway classification as of 1942.;"Contour interval 20 feet";"Surveyed in 1909, 1922, 1936, 1937 ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

166. 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.).

167. Illinois (Logan County), Lincoln quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1913. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1911.";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.).

168. Illinois, Mackinaw quadrangle

Maps University Of Illinois Urbana Champaign Public content
1932. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1927-1928"; (W 89⁰30ʹ00ʺ--W 89⁰15ʹ00ʺ/N 40⁰45ʹ00ʺ--N 40⁰30ʹ00ʺ);Relief shown by contours and spot heights.;Sh... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

169. Illinois, Macomb quadrangle : topography.

Maps University Of Illinois Urbana Champaign Public content
1914. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot heights.;1 map, colored;45 x ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

170. 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.).

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