Columbia subject headings:
Islam--Doctrines--Early works to 1800.
Worship (Islam)--Early works to 1800.
Harvard subject headings:
Islam--Doctrines--Early works to 1800
Worship (Islam)--Early works to 1800.
Princeton subject headings:
Islam--Doctrines--Early works to 1800.
Worship (Islam)--Early works to 1800.