Columbia subject headings:
Catholic Church--Controversial literature--Catholic authors.
Christian sociology.
Protestantism.
Social history.
Harvard subject headings:
Catholic Church--Apologetic works.
Catholic Church--Doctrines--Catholic authors.
Catholic Church--Doctrines.
Christian sociology.
Protestantism
Social history
Princeton subject headings:
Catholic Church--Controversial literature--Catholic authors.
Christian sociology.
Protestantism.
Social history.