http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Henry Gannett, chief topographer ; R.U. Goode, geographer in charge ; triangulation by Chas. F. Urquhart ; topography by H.S. Wallace ; surveyed in 1890.
Relief shown by contours and spot heights.
Verso: text "The topographic maps of the United States", and key to conventional map signs.