Columbia subject headings:
Luxemburg, Rosa, 1871-1919--Congresses.
Women communists--Congresses.
Harvard subject headings:
Luxemburg, Rosa, 1871-1919--Congresses.
Socialism--Congresses
Princeton subject headings:
Communism--China--Congresses.
Democracy--Congresses.
Luxemburg, Rosa, 1871-1919--Foreign public opinion, Chinese--Congresses.
Luxemburg, Rosa, 1871-1919--Political and social views--Congresses.
Socialism--Congresses.