Columbia subject headings:
Christianity and other religions--Judaism--Congresses.
Crusades--Congresses.
Judaism--Relations--Christianity--Congresses.
Harvard subject headings:
Christianity and other religions--Judaism--Congresses
Crusades--Congresses
Judaism--Relations--Christianity--Congresses
Princeton subject headings:
Christianity and other religions--Judaism--Congresses.
Crusades--Congresses.
Judaism--Relations--Christianity--Congresses.