Columbia subject headings:
Harvard subject headings:
Holy Roman Empire--History--Otto I, 936-973.
Holy Roman Empire--Kings and rulers--Biography.
Otto I, Holy Roman Emperor, 912-973.
Princeton subject headings:
Germany--History--Otto I, 936-973.
Germany--Kings and rulers--Biography.
Holy Roman Empire--History--Otto I, 936-973.
Otto I, Holy Roman Emperor, 912-973.