"Smaller collections include the working papers of Walter Tracy RDI. " "Type Museum". Type Museum. Retrieved 6 June 2009.
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Nemeth, Titus (2017). Arabic type-making in the machine age: the influence of technology on the form of Arabic type, 1908–1993. Leiden Boston: Brill. pp. 109–129. ISBN9789004349308. OCLC993752295.