Columbia subject headings:
Islam--Doctrines--Congresses.
Prayer--Christianity--Congresses.
Prayer--Islam--Congresses.
Theology, Doctrinal--Congresses.
Harvard subject headings:
Princeton subject headings:
Islam--Doctrines--Congresses.
Prayer--Christianity--Congresses.
Prayer--Islam--Congresses.
Theology, Doctrinal--Congresses.