1899. Geological Survey (U.S.). At head of map "Report, Public resolution No. 25, 55th Congress, 3d session."; Relief shown by contours and spot heights.; Survey in 1898.; "Map 10... U.S. Geological Survey (Washington, D.C).
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1902. Geological Survey (U.S.). Relief shown by contours and spot heights. 89 x 66 centimeters Scale 1:62,500 City Maps. U.S. Geological Survey (Washington).
1897. Geological Survey (U.S.). Relief shown by contours.; Contour interval 20 feet.; "Henry Gannet, Chief Geographer, H.M. Wilson, Geographer in charge; Topography by Frank Sutto... U.S. Geological Survey (Washington, D.C).
1906. Geological Survey (U.S.). Shows mines. Relief shown by contours and spot heights.; "E.M. Douglas, Geographer in charge. Topography by R.H. Sargent. Triangulation by T.M. Ban... U.S. Geological Survey (Washington, D.C).
1904. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Datum is mean sea level." sheets 69 x 110 centimeters or smaller Scale 1:31,680 General Map Collection. The Survey (Washington, D.C).
6. Camp Dodge
1918. Geological Survey (U.S.). Relief shown by contours and spot heights.; Title in upper right corner: Iowa, Camp Dodge quadrangle; at head of map: Topography.; "Surveyed in 190... The Survey (Washington, D.C).
1919. Geological Survey (U.S.). Relief shown by contours and spot heights.; Alternate title in upper right corner: Georgia, Camp Gordon and vicinity; at head of map: Topography.; ... The Survey (Washington).
1901. Geological Survey (U.S.). Relief shown by contours.; "Reconnaissance map."; "Survey in 1888."; "Engraved Oct 1891 by U.S.G.S."; Shows roads, and railroads.; Text on verso. 4... The Survey (Washington, D.C).
1909. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Control by Coast and Geodetic Survey."; "Surveyed in 1906-1907. Edition of May 1909, reprinted 1921. A... The Survey (Washington).
1928. Geological Survey (U.S.). Surveyed in 1925.; Relief shown by contours, shading, and spot heights.; Shows roads, campgrounds, tunnel, waterholes, caves and other natural feat... U.S. Geological Survey (Washington, D.C).