“Preface.” Beautiful Mathematics, by Martin Erickson, 1st ed., Mathematical Association of America, Washington, DC, 2011, pp. ix-x, www.jstor.org/stable/10.4169/j.ctt13x0n39.2. Accessed 14 June 2021.
Erickson, M. (2011). Preface. In Beautiful Mathematics (pp. Ix-X). Washington, DC: Mathematical Association of America. Retrieved June 14, 2021, from http://www.jstor.org/stable/10.4169/j.ctt13x0n39.2
Erickson, Martin. "Preface." In Beautiful Mathematics, Ix-X. Washington, DC: Mathematical Association of America, 2011. Accessed June 14, 2021. http://www.jstor.org/stable/10.4169/j.ctt13x0n39.2.
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