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The Encyclical Letter  'Humanae Vitae'  on the Vatican website

Original Latin text of Humanae Vitae

The Humanae Vitae controversy, chapter from George Weigel s biography of Karol Wojtyla

G. EM Anscombe:  Contraception and Chastity

Cardinal Varkey s Letter on Family Planning Trends Among Catholics: Varkey Cardinal Vithayathil,  Kerala, India

Natural Family Planning, John and Sheila Kippley s website that supports Humanae Vitae and provides instruction in natural family planning

The Vindication of Humanae Vitae, by Mary Eberstadt, First Things Magazine, August / September issue, 2008.