Columbia subject headings:
Benedict XVI, Pope, 1927-
Boff, Leonardo.
Catholic Church--Doctrines--History--20th century.
Catholic Church--History--1965-
Freedom of speech in the church.
Harvard subject headings:
Benedict XVI, Pope, 1927-
Boff, Leonardo.
Catholic Church--Doctrines--History--20th century.
Catholic Church--History--1965-
Freedom of speech in the church.
Princeton subject headings:
Benedict XVI, Pope, 1927-2022.
Boff, Leonardo.
Catholic Church--Doctrines--History--20th century.
Catholic Church--History--1965-.
Freedom of speech in the church.