Columbia subject headings:
Germany--History--William I, 1871-1888.
William I, German Emperor, 1797-1888.
Harvard subject headings:
Germany--History--William I, 1871-1888.
William I, German Emperor, 1797-1888.
Princeton subject headings:
Germany--History--William I, 1871-1888.
William I, German Emperor, 1797-1888.