Columbia subject headings:
Harvard subject headings:
Christian sects--History--Congresses.
Christianity and other religions--Congresses
Dissenters, Religious--History--Congresses.
Dissenters, Religious--Legal status, laws, etc.--History--Congresses.
Religious discrimination--History--Congresses.
Religious tolerance--Christianity--History--Congresses.
Princeton subject headings:
Christian sects--History--Congresses.
Christianity and other religions--Congresses.
Dissenters, Religious--History--Congresses.
Dissenters, Religious--Legal status, laws, etc.--History--Congresses.
Religious discrimination--History--Congresses.
Religious tolerance--Christianity--History--Congresses.