Columbia subject headings:
Electors (Kurfürsten)
Holy Roman Empire--Kings and rulers--Election.
Holy Roman Empire. Bulla Aurea.
Harvard subject headings:
Electors (Kurfürsten)
Holy Roman Empire--Kings and rulers--Election.
Holy Roman Empire. Bulla Aurea.
Princeton subject headings:
Holy Roman Empire--History--Charles IV, 1347-1378.
Holy Roman Empire.