Columbia subject headings:
France--History--1914-1940.
World War, 1914-1918--Atrocities.
Harvard subject headings:
France--History--1914-
France--History--1914-1940.
World War, 1914-1918--Atrocities
Princeton subject headings:
France--History--German occupation, 1914-1918.
World War, 1914-1918--Atrocities.