|←Author Index: Jo||Pope John XVIII
|Pope from 1003 to 1009.|
Works by John XVIII
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Works about John XVIII
- “Pope John XVIII (XIX),” in Catholic Encyclopedia, 1913.
- “John XVIII (pope)” in Encyclopædia Britannica, (11th ed.), 1911.
Works by this author published before January 1, 1923 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.