Columbia subject headings:
World War, 1914-1918--Influence.
World War, 1914-1918--Moral and ethical aspects.
World War, 1914-1918--Psychological aspects.
Harvard subject headings:
World War, 1914-1918--Influence
World War, 1914-1918--Moral and ethical aspects
World War, 1914-1918--Psychological aspects
Princeton subject headings:
World War, 1914-1918--Influence.
World War, 1914-1918--Moral and ethical aspects.
World War, 1914-1918--Psychological aspects.