Columbia subject headings:
Frederick III, German Emperor, 1831-1888.
Germany--History--1789-1900.
Harvard subject headings:
Emperors--Germany--Biography.
Frederick III, German Emperor, 1831-1888.
Germany--History--1789-1900.
Princeton subject headings:
Frederick III, German Emperor, 1831-1888.
Germany--History--1789-1900.