Columbia subject headings:
World War, 1914-1918--Causes.
World War, 1914-1918--Germany.
Harvard subject headings:
Germany--Politics and government--1918-1933
World War, 1914-1918--Causes
World War, 1914-1918--Germany.
Princeton subject headings:
Germany--Politics and government--1918-1933.
World War, 1914-1918--Causes.