- Robert Stauffer, comp. Bahá'í Studies Bulletin: Index by volume (1998). — List of articles in all issues of Bahai Studies Bulletin, 1982-1992.
- Abdu'l-Bahá, Shoghi Effendi, Universal House of Justice. Hasan Elías, comp. Esperanto (2015). — Compilation on Esperanto.
- John T. Dale. Lidia Zamenhof (1996). — Brief biography of the daughter of Ludwig Lazarus Zamenhof, the creator of Esperanto.
- Abdu'l-Bahá, Shoghi Effendi, Universal House of Justice. Bahá'í World Centre, comp. Principle of an International Auxiliary Language, The (1979?).
- Phyllis Ghim-Lian Chew. Whither the International Auxiliary Language? (1989). — The Baha'i Faith has promised that a day will come when there will be a universal auxiliary language...
- Miriam Dixson. Women and Religious Change: A case study in the colonial migrant experience (2000). — The story of Margaret Dixson, and one woman's growth from Anglicanism, via numerology and astrology,...
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