Columbia subject headings:
Harvard subject headings:
Holy Roman Empire--History--Sources--Catalogs.
Holy Roman Empire--Kings and rulers--Succession.
Mainz (Rhineland-Palatinate, Germany)--Archival resources.
Princeton subject headings:
Austria--History--Sources.
Austria--Kings and rulers--Succession.
Germany--History--Sources.
Germany--Kings and rulers--Succession.
Holy Roman Empire--History--Sources.
Holy Roman Empire--Kings and rulers--Succession.
Mainzer Erzkanzler-Archiv--Catalogs.