Columbia subject headings:
Khalwatīyah--Early works to 1800.
Sufism--Early works to 1800.
Harvard subject headings:
Khalwatīyah--Early works to 1800.
Sufism--Early works to 1800
Princeton subject headings:
Khalwatīyah--Early works to 1800.
Poetry.
Sufism--Early works to 1800.