Columbia subject headings:
Harvard subject headings:
Authoritarianism--History--20th century--Congresses.
Psychoanalysis--History--20th century--Congresses.
Totalitarianism--History--20th century--Congresses.
Princeton subject headings:
Authoritarianism--History--20th century--Congresses.
Psychoanalysis--History--20th century--Congresses.
Psychoanalysis--Political aspects--History--20th century--Congresses.