Columbia subject headings:
Harvard subject headings:
Germany--History--843-1273--Sources.
Germany--Kings and rulers--Sources.
Holy Roman Empire--History--843-1273--Sources.
Holy Roman Empire--Kings and rulers--Sources.
Property--Germany--History--Sources.
Property--Holy Roman Empire--History--Sources.
Princeton subject headings:
Germany--History--To 1517--Sources.
Germany--Kings and rulers--History--Sources.
Holy Roman Empire--History--Sources.