Columbia subject headings:
Catholic Church--Controversial literature--Miscellaneous authors.
Catholic Church--Controversial literature.
Catholic Church--Doctrines--Miscellaneous authors.
Catholic Church--Foreign relations.
Harvard subject headings:
Catholic Church--Controversial literature.
Catholic Church--Doctrines--Miscellaneous authors.
Catholic Church--Foreign relations.
Princeton subject headings:
Catholic Church--Controversial literature.
Catholic Church--Foreign relations.