'Abdu'l-Bahá on Divine Philosophy, by Abdu'l-Bahá, Elizabeth Fraser Chamberlain, comp. (1918). — An early collection of writings and talks of Abdu'l-Baha.
Baha'u'llah's Ground Plan of World Fellowship, by George Townshend (1936). — This talk, proposing a practical scheme for addressing the problem of world-fellowship, was delivere...