- Camphor and the Camphor Fountain, by Frank Lewis (1999-04). — What is the meaning of the camphor fount — a symbol common in the writings of Baha'u'llah, Abdu'l-...
- Camphor Fountain: Compilation and Commentary, by Mark A. Foster (2003).
- Encyclopaedia Iranica: Selected articles related to Persian culture, religion, philosophy and history, by Encyclopaedia Iranica (1982-2023). — Sorted, categorized collection of links to over 170 articles.
- Kitáb-i-Aqdas (Most Holy Book): Notes on the "choice wine", by Abdu'l-Bahá, Brent Poirier, Iraj Ayman, Frank Lewis (2000). — Explores Baha’i, Biblical, and Qur’anic symbolism of bread, wine, and camphor as metaphors for d...
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