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.).
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1926. Geological Survey (U.S.). Relief shown by contours and spot heights.;"Control in part from railroad valuation surveys, Surveyed in 1924";Contour interval 10 feet.;1 map, col... Geological Survey Division (Urbana, Ill.) and Geological Survey (U.S.).