Sylvester Graham's Lectures on the Science of Human Life https://books.google.it/books?id=nRwDAAAAQAAJ, condensed by T. Baker, Manchester: John Heywood, 1881, p. 76.
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Sylvester Graham , fue un nutricionista estadounidense, creador de la harina Graham y de la galleta Graham. Wikipedia

Sylvester Graham's Lectures on the Science of Human Life https://books.google.it/books?id=nRwDAAAAQAAJ, condensed by T. Baker, Manchester: John Heywood, 1881, p. 76.