- Chosen Highway, The, by Lady Sarah Louisa Blomfield (1940/1967). Oral Bahá'í histories collected by an eminent early English Bahá'í, first published in 1940.
- Dawlatábádí, Sayyed Yahyá, by Abbas Amanat (1996). Brief excerpt, with link to article offsite.
- El Legado de Una Nueva Profecía: Historia de la Fe Bahá'í en Chile, by Rocio Macarena Montoya Jorquera (2017-06). History of the Bahá'ís in Chile, from Martha Root's arrival in 1920, Marcia Stewart first pioneer in 1939, experiences under the Pinochet government, to the establishment of the Bahá'í Temple in 2016.
- First Obligation, The: Lady Blomfield and the Save the Children Fund, by Robert Weinberg (1998). Bio prepared for the UK Bahá'í Centenary (1998-99).
- Gloriously Tragic Life of Mathew Kaszab, The: Letters from a Pioneer 1939-1942, Anne King Sadeghpour, comp. and ed. (2019). The unusual drama of a pioneering life in Central America, revealed through personal letters. This account offers glimpses of a maturing Bahá’í administration in the U.S. and of what was learned through teaching efforts in Latin America.
- Haifa: Transformation of an Arab Society, 1918-1939, by May Seikaly (1995). Front matter, introduction, and maps only; excerpts as provided by Google Books, but enough to give some background to Haifa in earliest 20th century.
- Historical Background of the Panama Temple, by Ruth Pringle (1972 March-April). A history of the Bahá’í Faith in Panama during the first and second U.S. Seven Year Plans, from the arrival of the first pioneers in 1939 to the formation of the first Regional Assembly in 1951.
- In search of Martha Root: An American Bahá'í feminist and peace advocate in the early twentieth century, by Jiling Yang (2007). Early life of Root, her four world teaching trips from 1919 to 1939 with a focus on peace advocacy, and gender and identity reflections on Tahirih. Link to thesis (offsite).
- Nicolas, Alphonse (A.-L-.M. Nicolas), by Nader Nasiri-Moghaddam (2021). Brief excerpt, with link to article offsite.
- Panama, The Crossroads between the Continents: The Story of the Early Days of the Bahá'í Faith in Panama 1939-1972, by Fuad Izadinia (2015). History of the first Bahá'í community in Panama, including a photo album; biographies of Martha Root, Mathew Kaszab, Louise Caswell, Cora Oliver, Julie Lois Regal, Hascle Cornbleth–Colon, Alfred Osborne, Raquel Francois, Clare Hamilton, Blanca De Campos.
- Root, Martha, by Richard Francis (1993/1998). Bio of the "Herald of the Kingdom, Lioness at the Threshold."
- Root, Martha Louise, by Loni Bramson (2011).
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