Columbia subject headings:
Harvard subject headings:
Germany--History--20th century.
Louis Ferdinand, Prince of Prussia, 1907-1994
Princes--Germany--Prussia--Biography.
Prussia (Germany)--History--1870-
Princeton subject headings:
Germany--History--20th century.
Louis Ferdinand, Prince of Prussia, 1907-
Princes--Germany--Prussia--Biography.
Prussia (Germany)--History--1870-