Columbia subject headings:
Belgium--History--Baudouin I, 1951-1993.
Belgium--History--German occupation, 1940-1945.
Harvard subject headings:
Belgium--History--Baudouin I, 1951-
Belgium--History--German occupation, 1940-1945.
Princeton subject headings:
Belgium--History--Baudouin I, 1951-1993.
Belgium--History--German occupation, 1940-1945.