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| Catholic Encyclopedia | 1913 edition. Includes 7,495 articles. The latest edition is available in print in the Library. |
| Catholic Online | Information about popes, saints, and scriptures; news; schools; bookstores; etc. |
| Catholic-Pages | Thousands of articles and links. |
| Interdisciplinary Encyclopaedia of Religion and Science | Pontifical University of the Holy Cross/University of Bari. |
| Nature and Scope of the Problem of Sexual Abuse of Minors by Catholic Priests and Deacons in the United States | John Jay College of Criminal Justice. February 2004 report. |
| Social Development and World Peace | United States Conference of Catholic Bishops. Documents, news, links, etc. |
| The Vatican | News; full text of documents of the second Vatican Council, catechism of the Catholic church, papal encyclicals, apostolic constitutions, exhortations, letters; biographies; information on the Roman curia; etc. |
| Women's Ordination | Catholic Internet Library. >1000 articles collected by Catholic theologians, plus a summary of the two sides of the debate. |