Columbia subject headings:
International Socialist Congress--History.
Luxemburg, Rosa, 1871-1919.
Women communists--Germany--Biography.
Harvard subject headings:
Communists--Germany--Biography
Luxemburg, Rosa, 1871-1919
Socialist International (1889-1922)--History.
Princeton subject headings:
International Socialist Congress--History.
Luxemburg, Rosa, 1871-1919.
Women communists--Germany--Biography.