Columbia subject headings:
Democracy--Congresses.
Democracy--Religious aspects--Catholic Church--Congresses.
Totalitarianism--Congresses.
Harvard subject headings:
Democracy--Congresses
Democracy--Religious aspects--Catholic Church--Congresses.
Totalitarianism--Congresses
Princeton subject headings:
Democracy--Congresses.
Democracy--Religious aspects--Catholic Church--Congresses.
Totalitarianism--Congresses.