Columbia subject headings:
Harvard subject headings:
Belgium--History--German occupation, 1914-1918
World War, 1914-1918--Atrocities--Belgium
World War, 1914-1918--Campaigns--Belgium
Princeton subject headings:
Belgium--History--German occupation, 1914-1918.
World War, 1914-1918--Atrocities--Belgium.
World War, 1914-1918--Campaigns--Belgium.