Pius IX, Quanta Cura (On Current Errors), 1864 Available on-line at the EWTN web site:
http://www.ewtn.com/library/ENCYC/P9QUANTA.htm

Leo XIII, Diuturnum Ilud, (On Government Authority), 1881 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/leo_xiii/encyclicals/documents/hf_l-xiii_enc_29061881_diuturnum_en.html

Leo XIII, Humanum Genus (On Freemasonry and Naturalism), 1884 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/leo_xiii/encyclicals/documents/hf_l-xiii_enc_18840420_humanum-genus_en.html

Leo XIII, Libertas Praestantissimum (On Human Liberty), 1888 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/leo_xiii/encyclicals/documents/hf_l-xiii_enc_20061888_libertas_en.html

Pius X, E Supremi (Encyclical on the Restoration of All Things in Christ), 1903 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_x/encyclicals/documents/hf_p-x_enc_04101903_e-supremi_en.html

Pius X, Pascendi Dominici Gregis (Encyclical on the Doctrines of the Modernists), 1907 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_x/encyclicals/documents/hf_p-x_enc_19070908_pascendi-dominici-gregis_en.html

Pius X, Notre Charge Apostolique (Our Apostolic Mandate), encyclical of 1910 Available at this Catholic web site:
http://www.catholicculture.org/docs/doc_view.cfm?recnum=5456

Pius XI, Miserentissimus Redemptor (Encyclical on Reparation to the Sacred Heart), 1928 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_xi/encyclicals/documents/hf_p-xi_enc_08051928_miserentissimus-redemptor_en.html

Pius XI, Mit Brennender Sorge, (Encyclical on the Church and the German Reich), 1937 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_xi/encyclicals/documents/hf_p-xi_enc_14031937_mit-brennender-sorge_en.html

Pius XII, Summi Pontificatus (Encyclical on the Unity of Human Society), 1939 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_xii/encyclicals/documents/hf_p-xii_enc_20101939_summi-pontificatus_en.html

Pius XII, Evangelii Praecones (Encyclical on Promotion of Catholic Missions), 1951 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/pius_xii/encyclicals/documents/hf_p-xii_enc_02061951_evangelii-praecones_en.html


Austin Flannery, O.P., General Editor, Vatican Council II: The Conciliar and Post-Conciliar Documents, 1992 rev. ed., Costello Publishing Company, Northpoint, New York (includes Humanae Personae Dignitatem, Dignitatis Humanae, Lumen Gentium, Nostra Aetate, and Unitatis Redintegratio)

Paul VI, Ecclesiam Suam (Encyclical on the Church), 1964 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/paul_vi/encyclicals/documents/hf_p-vi_enc_06081964_ecclesiam_en.html

John Paul II, Apostolic Letter Ordinatio Sacerdotalis (On Reserving Priestly Ordination to Men Alone), 1994 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/john_paul_ii/apost_letters/documents/hf_jp-ii_apl_22051994_ordinatio-sacerdotalis_en.html

John Paul II, Tertio Millennio Adveniente: Apostolic Letter to the Bishops, Clergy, and Lay Faithful On Preparation for the Jubilee of the Year 2000, 1994 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/john_paul_ii/apost_letters/documents/hf_jp-ii_apl_10111994_tertio-millennio-adveniente_en.html

John Paul II, Crossing the Threshold of Hope, ed. Vittorio Messori, A. A. Knopf, 1995
http://www.amazon.com/exec/obidos/tg/detail/-/0679765611/qid=1114150671/sr=1-1/ref=sr_1_1/103-6945791-8207819?v=glance&s=books

John Paul II, Encyclical Letter Evangelium Vitae (On the Value and Inviolability of Human Life), 1995 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/john_paul_ii/encyclicals/documents/hf_jp-ii_enc_25031995_evangelium-vitae_en.html

John Paul II, Ut Unum Sint (Encyclical On Commitment to Ecumenism), 1995 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/john_paul_ii/encyclicals/documents/hf_jp-ii_enc_25051995_ut-unum-sint_en.html

Commission for Religious Relations with the Jews, We Remember: A Reflection on the Shoah, 1998 Available on-line at the Vatican web site:
http://www.vatican.va/roman_curia/pontifical_councils/chrstuni/documents/rc_pc_chrstuni_doc_16031998_shoah_en.html

Congregation for the Doctrine of the Faith, Dominus Iesus: On the Unicity and Salvific Universality of Jesus Christ and the Church, 2000 Available on-line at the Vatican web site:
http://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_con_cfaith_doc_20000806_dominus-iesus_en.html

John Paul II, Novo Millennio Ineunte: Apostolic Letter To the Bishops, Clergy, and Lay Faithful at the Close of the Great Jubilee of the Year 2000, 2001 Available on-line at the Vatican web site:
http://www.vatican.va/holy_father/john_paul_ii/apost_letters/documents/hf_jp-ii_apl_20010106_novo-millennio-ineunte_en.html

Pontifical Council For Culture and Pontifical Council For Interreligious Dialogue, Jesus Christ The Bearer Of The Water Of Life: A Christian reflection on the "New Age," 2003 Available on-line at the Vatican web site:
http://www.vatican.va/roman_curia/pontifical_councils/interelg/documents/rc_pc_interelg_doc_20030203_new-age_en.html