http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Global seafloor topography measured & estimated from gravity data derived from satellite altimetry and shipboard depth soundings
World Data Center-A for Marine Geology & Geophysics
National Geophysical Data Center and the World Data Service for Geophysics, Boulder ; by W.H.F. Smith and D.T. Sandwell.
Title from HTML index page (viewed Jan. 31, 2014).
"NGDC data announcement number 97-MGG-03."