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 C.F. Urquhart ; topography by R.O. Gordon ; surveyed in 1889.
Relief indicated by contours and spot heights.
Verso: text "The topographic maps of the United States", and standard symbols used.