Columbia subject headings:
Albert I, King of the Belgians, 1875-1934--Congresses.
Belgium--History--Albert I, 1909-1934--Congresses.
Harvard subject headings:
Albert I, King of the Belgians, 1875-1934--Congresses.
Belgium--History--Albert I, 1909-1934--Congresses.
Princeton subject headings:
Albert I, King of the Belgians, 1875-1934--Congresses.
Belgium--History--Albert I, 1909-1934--Congresses.