Columbia subject headings:
Holy Roman Empire--History--Otto I, 936-973.
Holy Roman Empire--History--Otto II, 973-983.
Holy Roman Empire--History--Otto III, 983-1002.
Holy Roman Empire--Politics and government.
Legitimacy of governments--Holy Roman Empire.
Political stability--Holy Roman Empire.
Harvard subject headings:
Holy Roman Empire--History--Otto I, 936-973.
Holy Roman Empire--History--Otto II, 973-983.
Holy Roman Empire--History--Otto III, 983-1002.
Holy Roman Empire--Politics and government.
Legitimacy of governments--Holy Roman Empire.
Political stability--Holy Roman Empire.
Princeton subject headings: