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Gibb, G. (1876). "Ultra-Centenarian Longevity". The Journal of the Anthropological Institute of Great Britain and Ireland. Royal Anthropological Institute of Great Britain and Ireland. 5: 82–101. doi:10.2307/2841365. Diakses tanggal 6 February 2015.
mpg.de
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Maier, H., Gampe, J., Jeune, B., Robine, J.-M., Vaupel, J. W. (Eds.) (2010). Supercentenarians. Germany: Max Planck Institute for Demographic Research. hlm. 325. ISBN978-3-642-11519-6.Pemeliharaan CS1: Teks tambahan: authors list (link)
newspapers.com
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