1907. Geological Survey (U.S.). Surveyed in 1905.;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.).
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1907. Geological Survey (U.S.). Surveyed in 1906.;"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot heights.;1 map, colored;45 x 34 cm.;1... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1907. Geological Survey (U.S.). Surveyed in 1905.;"Surveyed in cooperation with the State of Illinois.";Includes diagram of township.;Relief shown by contours.;1 map, colored;45 x... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1907. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1905.";"Surveyed in cooperation with the State of Illinois.";Relief indicated by contours and spot heights.;... Geological Survey (U.S.) and State Survey (Urbana, Ill.).