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Purvis, Alston W., 1943- (Personal Name)
Jong, C. W., Type : A visual history of typefaces and graphic styles, 2010 : t. p. (Alston W. Purvis)
WWW VIAF, ago. 30, 2017. Purvis, Alston W., 1943- http://viaf.org/viaf/7604663/
https://en.wikipedia.org/wiki/Alston_Purvis