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    Political Thought and the Union of 1603 (2006, ISBN 0521026202), page 199 Julian Havil, John Napier: Life, Logarithms, and Legacy (2014, ISBN 1400852188), page...
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  • Thumbnail for Proof that 22/7 exceeds π
    proof "one of the more beautiful results related to approximating π". Julian Havil ends a discussion of continued fraction approximations of π with the...
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  • Concepts and Contexts. Brooks/Cole. p. 314. ISBN 978-0-495-55972-6. Julian Havil (2003). Gamma: Exploring Euler's Constant. Princeton University Press...
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  • Cosmos by Robert P. Kirshner (2002) Gamma: Exploring Euler's Constant by Julian Havil [de] (2003) Journey from the Center of the Sun by Jack B. Zirker (2004)...
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  • Livio (2003). The Golden Ratio. Headline Review. ISBN 978-0-7472-4988-7. Julian Havil (2003). Gamma. Princeton. ISBN 978-0-691-09983-5. Paul J. Nahin (1998)...
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    Magazine of History and Biography. Virginia Historical Society. p. 272. Julian Havil (5 October 2014). John Napier: Life, Logarithms, and Legacy. Princeton...
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    25 (2): 433–436. doi:10.1086/347092. JSTOR 225380. S2CID 144038198. Julian Havil. "Defying gravity: The uphill roller".[dead link] "Place Search 1674...
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    Magazine of History and Biography. Virginia Historical Society. p. 272. Julian Havil (October 5, 2014). John Napier: Life, Logarithms, and Legacy. Princeton...
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  • Book of Numbers. Springer-Verlag New York, Inc. ISBN 0-387-97993-X. Havil, Julian (2007). Nonplussed!. Princeton University Press. ISBN 978-0-691-12056-0...
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    Fleron, Julian F. (1999). "Gabriel's Wedding Cake". The College Mathematics Journal. 30 (1): 35–38. doi:10.2307/2687201. JSTOR 2687201. Havil, Julian (2007)...
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