Jabarkan Catatan dari Index Librorum Prohibitorum

"Index of Prohibited Books", The Catholic Encyclopedia (Volume VII, 1910): "The first Roman Index of Prohibited Books (Index librorum prohibitorum), published in 1559 under Paul IV, was very severe, and was therefore mitigated under that pontiff by decree of the Holy Office of 14 June of the same year. It was only in 1909 that this Moderatio Indicis librorum prohibitorum (Mitigation of the Index of Prohibited Books) was rediscovered in Codex Vaticanus lat. 3958, fol. 74, and was published for the first time."

The ten "tridentine" rules on the censorship of books (English)

The papal constitution Sollicita ac provida regulating the work of the Congregations of the Holy Office and of the Index (Latin)

Vatican opens up secrets of Index of Forbidden Books, Dec 22, 2005

Secrets Behind The Forbidden Books  - America (magazine), February 7, 2005

El Index de la Iglesia - The Roman Church Index: México, 1948.

An index of prohibited books, by command of the present pope, Gregory XVI in 1835; being the latest specimen of the literary policy of the Church of Rome, Joseph Mendham, London: Duncan and Malcolm, 1840. Also at the Internet Archive.