Columbia subject headings:
Harvard subject headings:
Communists--Germany--Biography
Levi, Paul, 1883-1930
Luxemburg, Rosa, 1871-1919
Socialists--Germany--Biography
Princeton subject headings:
Communists--Germany--Biography.
Levi, Paul, 1883-1930.
Luxemburg, Rosa, 1871-1919.
Socialists--Germany--Biography.