Columbia subject headings:
Islam--Customs and practices--Early works to 1800.
Islam--Doctrines--Early works to 1800.
Sufism--Doctrines--Early works to 1800.
Harvard subject headings:
Princeton subject headings:
Islam--Customs and practices.
Islam--Doctrines.
Pillars of Islam.
Purity, Ritual--Islam.
Worship (Islam)