Lloyd, David R. “How Old Are the Platonic Solids?” The Best Writing on Mathematics 2013, edited by Mircea Pitici, by ROGER PENROSE, Princeton University Press, PRINCETON; OXFORD, 2014, pp. 149–162, www.jstor.org/stable/j.ctt4cgb74.19. Accessed 27 Feb. 2021.
Lloyd, D. (2014). How Old Are the Platonic Solids? In PENROSE R. (Author) & Pitici M. (Ed.), The Best Writing on Mathematics 2013 (pp. 149-162). PRINCETON; OXFORD: Princeton University Press. Retrieved February 27, 2021, from http://www.jstor.org/stable/j.ctt4cgb74.19
Lloyd, David R. "How Old Are the Platonic Solids?" In The Best Writing on Mathematics 2013, edited by Pitici Mircea, by PENROSE ROGER, 149-62. PRINCETON; OXFORD: Princeton University Press, 2014. Accessed February 27, 2021. http://www.jstor.org/stable/j.ctt4cgb74.19.
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