Columbia subject headings:
Harvard subject headings:
Belgium--History--German occupation, 1914-1918.
World War, 1914-1918--Atrocities--Belgium
World War, 1914-1918--Religious aspects--Catholic Church
Princeton subject headings:
Catholic Church--Belgium--History--1914-1918.
Catholic Church--Germany--History--1914-1918.
World War, 1914-1918--Catholic Church.