Columbia subject headings:
Islam--Doctrines--Early works to 1800.
Islamic philosophy--Early works to 1800.
Sufism--Early works to 1800.
Harvard subject headings:
Islam--Doctrines--Early works to 1800.
Islamic philosophy--Early works to 1800.
Sufism--Early works to 1800
Princeton subject headings:
Islam--Doctrines--Early works to 1800.
Islamic philosophy--Early works to 1800.
Sufism--Early works to 1800.