- John Walbridge. Bahá'í Shrines (1989).
- Bahá'u'lláh and Abdu'l-Bahá et al Research Department of the Universal House of Justice, comp. Holy Places at the Bahá'í World Centre (1968).
- Universal House of Justice. Geoffrey W. Marks, comp. Messages from the Universal House of Justice 1963-1986: Third Epoch of the Formative Age (1996).
- Virginia Orbison. Notes on Words of the Guardian (1956). — Ten pages of notes, preserved as an appendix to Orbison's lengthy manuscript "Diary of a Pilgrimage ...
- Universal House of Justice. Reflections on the First Century of the Formative Age (2023-11-28). — Overview of the Faith's developments and activities during the previous century, including the Guard...
- Guy Murchie. Visit to Persia, A (1965 March/April). — Notes from travels to Baha'i holy places in Iran in 1964, on a trip made with special permission fro...
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