Rockefeller Archive Center, Rockefeller Foundation records, projects, RG 1.1, series 401.R, box 60, folder 792
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Cambridge (England) England
Orthological Institute (Cambridge, England), “Memorandum regarding Basic English,” 100 Years: The Rockefeller Foundation, accessed May 23, 2017, http://rockefeller100.org/items/show/5092.