Columbia subject headings:
Harvard subject headings:
Capitalism--Congresses
Economics--Congresses
Luxemburg, Rosa, 1871-1919--Congresses.
Luxemburg, Rosa, 1871-1919--Political and social views--Congresses.
Socialism--History--Congresses.
Princeton subject headings:
Capitalism--Congresses.
Economics--Congresses.
Luxemburg, Rosa, 1871-1919--Congresses.
Luxemburg, Rosa, 1871-1919--Political and social views--Congresses.
Socialism--History--Congresses.