Columbia subject headings:
Harvard subject headings:
Germany--History--Charles V, 1519-1556.
Germany--Politics and government--1517-1648.
Princeton subject headings:
Ferdinand I, Holy Roman Emperor, 1503-1564.
Germany--History--Charles V, 1519-1556.
Holy Roman Empire--History--Charles V, 1519-1556.
Holy Roman Empire--Kings and rulers--Election.