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WikiPedia: Democritos http://www.britannica.com/ebc/article-9362512 http://www.thebigview.com/greeks/democritus.html http://plato.stanford.edu/entries/democritus/ http://www-personal.umich.edu/~jbourj/money3.htm http://www.iep.utm.edu/d/democrit.htm http://www.utm.edu/research/iep/d/democrit.htm https://commons.wikimedia.org/wiki/Category:Democr...