Columbia subject headings:
Harvard subject headings:
Hadith--Texts--Early works to 1800
Islam--Prayers and devotions--Early works to 1800.
Sufism--Prayers and devotions--Early works to 1800.
Princeton subject headings:
Hadith--Texts--Early works to 1800.
Islam--Prayers and devotions--Early works to 1800.
Sufism--Prayers and devotions--Early works to 1800.