“Acknowledgements.” Gamma: Exploring Euler's Constant, by Julian Havil and Freeman Dyson, Princeton University Press, PRINCETON; OXFORD, 2003, pp. xvii-xviii, www.jstor.org/stable/j.ctt7sd75.4. Accessed 15 July 2020.
Havil, J., & Dyson, F. (2003). Acknowledgements. In Gamma: Exploring Euler's Constant (pp. Xvii-Xviii). PRINCETON; OXFORD: Princeton University Press. Retrieved July 15, 2020, from www.jstor.org/stable/j.ctt7sd75.4
Havil, Julian, and Freeman Dyson. "Acknowledgements." In Gamma: Exploring Euler's Constant, Xvii-viii. PRINCETON; OXFORD: Princeton University Press, 2003. Accessed July 15, 2020. www.jstor.org/stable/j.ctt7sd75.4.
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