Columbia subject headings:
Authoritarianism--History--Congresses.
Democracy--History--Congresses.
Rosenberg, Arthur, 1889-1943--Congresses.
Socialism--History--Congresses.
Harvard subject headings:
Authoritarianism--History--Congresses.
Democracy--History--Congresses.
Rosenberg, Arthur, 1889-1943--Congresses.
Socialism--History--Congresses.
Princeton subject headings:
Democracy.
Rosenberg, Arthur, 1889-1943.
Social conflict.
Socialism.