Columbia subject headings:
International law.
World War, 1914-1918--Atrocities.
World War, 1914-1918.
Harvard subject headings:
War (International law)
World War, 1914-1918
World War, 1914-1918--Atrocities
Princeton subject headings:
War (International law)
World War, 1914-1918--Atrocities.
World War, 1914-1918.