Columbia subject headings:
Harvard subject headings:
Germany--History--Revolution, 1918.
Germany--Politics and government--1918-1933
Kommunistische Partei Deutschlands--History.
World War, 1914-1918--Germany.
Princeton subject headings:
Germany--History--Revolution, 1918.
Germany--Politics and government--1918-1933.
Kommunistische Partei Deutschlands--History.
World War, 1914-1918--Germany.