Columbia subject headings:
Harvard subject headings:
Catholic Church, (3rd : 1971 : Rome)
Catholic Church--Apologetic works.
Catholic Church--Doctrines--Catholic authors.
Catholic Church--Doctrines.
Catholic Church. Synodus Episcoporum (3rd : 1971 : Rome, Italy)
Princeton subject headings:
Catholic Church, (3rd : 1971 : Rome, Italy)
Catholic Church--Doctrines--Catholic authors.