Gardner, Martin. “Transcendentals and Early Birds.” Martin Gardner in the Twenty-First Century, edited by Michael Henle and Brian Hopkins, 1st ed., Mathematical Association of America, 2012, pp. 37–38, www.jstor.org/stable/10.4169/j.ctt13x0ng0.9. Accessed 1 Mar. 2021.
Gardner, M. (2012). Transcendentals and Early Birds. In Henle M. & Hopkins B. (Eds.), Martin Gardner in the Twenty-First Century (pp. 37-38). Mathematical Association of America. Retrieved March 1, 2021, from http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.9
Gardner, Martin. "Transcendentals and Early Birds." In Martin Gardner in the Twenty-First Century, edited by Henle Michael and Hopkins Brian, 37-38. Mathematical Association of America, 2012. Accessed March 1, 2021. http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.9.
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