Columbia subject headings:
Harvard subject headings:
Apologetics--Early works to 1800
Apologetics--Early works to 1800.
Apologetics--History--17th century
Catholic Church--Controversial literature--Catholic authors.
Catholic Church--Doctrinal and controversial works--Catholic authors.
Catholic Church--Doctrines--Catholic authors.
Princeton subject headings:
Apologetics--Early works to 1800.
Catholic Church--Controversial literature--Early works to 1800.
Catholic Church--Doctrines--Early works to 1800.