Columbia subject headings:
Christianity and other religions--Islam--Early works to 1800.
Islam--Apologetic works--Early works to 1800.
Islam--Relations--Christianity--Early works to 1800.
Harvard subject headings:
Christianity and other religions--Islam--Early works to 1800.
Islam--Apologetic works--Early works to 1800
Islam--Relations--Christianity--Early works to 1800.
Princeton subject headings:
Christianity and other religions--Islam--Early works to 1800.
Islam--Apologetic works--Early works to 1800.
Islam--Relations--Christianity--Early works to 1800.