Źródła

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http://kazimierz-funk.inmemoriam.org/   

http://pl.wikipedia.org/wiki/Fritz_Pregl

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http://www.freeinfosociety.com/article.php?id=95 Niels Bohr

http://www.gap-system.org/~history/Posters/125.html Robert boyle

http://en.citizendium.org/wiki/John_Dalton John Dalton