Humanae Vitae

ENCYCLICAL LETTER
HUMANAE VITAE
OF THE SUPREME PONTIFF
PAUL VI
TO HIS VENERABLE BROTHERS
THE PATRIARCHS, ARCHBISHOPS, BISHOPS
AND OTHER LOCAL ORDINARIES
IN PEACE AND COMMUNION WITH THE APOSTOLIC SEE,
TO THE CLERGY AND FAITHFUL OF THE WHOLE CATHOLIC WORLD, AND TO ALL MEN OF GOOD WILL,
ON THE REGULATION OF BIRTH

https://www.vatican.va/content/paul-vi/en/encyclicals/documents/hf_p-vi_enc_25071968_humanae-vitae.html