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