Gannett, Henry, 1846-1914. U.S. Geological Survey, Department of the Interior ; compiled by Henry Gannett. Relief shown by hypsometric tints and contours. The Survey.
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Gannett, Henry, 1846-1914. by Henry Gannett. From its Annual report, 19th, part V, pl. II. Relief shown by contours. The Survey.
Gannett, Henry, 1846-1914 and Douglas, E. M. (Edward Morehouse), 1855-1932. Henry Gannett, chief cartographer ; E.M. Douglas, topographer in charge ; triangulation and topography by R.H. Chapman. Relief shown by contours, h... Department of the Interior, U.S. Geological Survey.