1913. George, Russell D., 1866-. Relief shown by contours and gradient tints.; Includes diagr. showing relation of Colorado to International map of the world and insets of "Canon C... Colorado State Geological Survey (Boulder, Colo).
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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.
1926. Wisconsin. Geology and Natural History Survey. Relief shown by contours and spot heights. Contour intervals 20 feet. 64 x 62 centimeters Scale 1:62,500 General Map Collection. The Survey (Madison, Wis).
1922. Geological Survey (U.S.). Relief shown by contours and spot heights.; At head of title: Department of the Interior, U.S. Geological Survey.; "Surveyed in 1912-1913."; "Alask... U.S. Geological Survey (Washington, D.C).
1928. Geological Survey (U.S.). Relief shown by contours and spot heights.; Includes inset showing "Railroad lines leading to Mesa Verde National Park." 70 x 107 centimeters Scale... The Survey (Washington, D.C).
1928. Geological Survey (U.S.). Relief shown by contours, spot heights, and bathymetric isolines.; Surveyed in 1925. Entire area mapped is below sea level.; Control by U.S. Geolog... Dept. of the Interior, U.S. Geological Survey (Washington, D.C).
1927. Geological Survey (U.S.). Relief shown by contours, and spot heights. 66 x 72 Centimeters Scale 1:125,000 ; General Map Collection. The Survey (Washington).
1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; East half--West half.; Surveyed in 1902-1923.; East half 1939 reprint. 217 x 101 centimeters, sheets ea... The Survey (Washington).
1912. Geological Survey (U.S.). Relief shown by contours and spot heights.; "R. B. Marshall, Chief Geographer"; "Topography by C.H. Birdseye, Geo. R. Davis ... H.L. McDonald, T.H.... The Survey (Washington, D.C).
1925. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Surveyed in 1923."; Text on verso. 45 x 49 centimeters Scale 1:62,500 General Map Collection. The Survey (Washington, D.C).