http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
explaining variation in the European Union
Dirk Leuffen, Berthold Rittberger and Frank Schimmelfennig.
Includes bibliographical references (269-281) and index.
European Union series (Palgrave Macmillan (Firm))