Columbia subject headings:
Harvard subject headings:
Communism--Germany--History--20th century
Democracy--Germany--History--20th century
Germany--History--1918-1933
Germany--History--Revolution, 1918
Germany--Politics and government--1918-1933
Luxemburg, Rosa, 1871-1919
Socialism--Germany--History--20th century
Soviet Union--History--Revolution, 1917-1921
Princeton subject headings:
Communism--Germany--History--20th century.
Democracy--Germany--History--20th century.
Germany--History--1918-1933.
Germany--History--Revolution, 1918.
Luxemburg, Rosa, 1871-1919.
Socialism--Germany--History--20th century.