Columbia subject headings:
Harvard subject headings:
Rifâî, Kenʼan, 1867-1950--Congresses.
Sufis--Turkey--Congresses.
Sufism--Turkey--Congresses.
Princeton subject headings:
Rifâî, Kenʼan, 1867-1950--Congresses.
Sufis--Turkey--Congresses.
Sufism--Turkey--Congresses.