Columbia subject headings:
World War, 1914-1918--Causes.
World War, 1914-1918--Reparations.
Harvard subject headings:
World War, 1914-1918--Causes
World War, 1914-1918--Reparations
Princeton subject headings:
World War, 1914-1918--Causes.
World War, 1914-1918--Reparations.