Columbia subject headings:
Catholic Church. Pope (1963-1978 : Paul VI). Ecclesiam suam.
Communism and religion.
Teilhard de Chardin, Pierre.
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano)
Harvard subject headings:
Catholic Church. Pope (1963-1978 : Paul VI). Ecclesiam suam.
Communism and religion.
Teilhard de Chardin, Pierre
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano)
Princeton subject headings: