http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gazetteer of planetary nomenclature 1994
International Astronomical Union--Working Group for Planetary System Nomenclature
"Information about all names of topographic and albedo features on planets and satellites that the International Astronomical Union has approved from its founding in 1919 through its triennial meeting in 1994."