Bertha: An Early American Bahá'í Stalwart, by Duane L. Herrmann (1991). — Brief profile of an early pioneer in Baha'i publications and education (and sister of Mabel Hyde Pai...
Profiles of Some Topeka Bahá'ís, by Duane L. Herrmann (1997). — Background for the author's research into Kansas Baha'i history.
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