1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Surveyed in 1926."; Index map on each sheet. 46 x 63 centimeters + Scale 1:31,680 General Map Collection. The Survey.
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1914. Geological Survey (U.S.). Relief shown by spot heights and contours. Contour interval 100 feet.; George Otis Smith, Director USGS. R.B. Marshall, Chief Geographer; Sledge Ta... The Survey.