Columbia subject headings:
Harvard subject headings:
Islam--Apologetic works--Early works to 1800
Islam--Doctrines--Early works to 1800
Islamic sects--Early works to 1800.
Religions--Early works to 1800
Princeton subject headings:
Islam--Apologetic works--Early works to 1800.
Islam--Doctrines--Early works to 1800.
Islamic sects--Early works to 1800.
Religions--Early works to 1800.