Columbia subject headings:
Harvard subject headings:
Birth control--Religious aspects--Catholic Church
Catholic Church. Pope (1963-1978 : Paul VI). Humanae vitae.
Contraception--Religious aspects--Catholic Church
Sex--Religious aspects--Catholic Church
Princeton subject headings:
Birth control--Religious aspects--Catholic Church.
Catholic Church. Pope (1963-1978 : Paul VI). Humanae vitae
Contraception--Religious aspects--Catholic Church.
Sex--Religious aspects--Catholic Church.