http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gold coins of the world, complete from 600 A.D. to the present
an illustrated standard catalogue with valuations
by Robert Friedberg. Rev. and edited by Jack Friedberg.
Preface in English, French, German, Italian, and Spanish.