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2. http://www.philedgerwood.com/atomists/atomism.html
3. Sylvia Berryman, Ancient Atomism, in The Stanford Encyclopedia of Philosophy, Edited by Edward N Zalta, 2008. URL = 〈 http://plato.stanford.edu/archives/fall2008/entries/atomismancient/ 〉.
4. Aaron J. Ihde, The Development of Modern Chemistry, Dover, New York, 1964, and references therein.
5. C N R Rao (Ed.) University General Chemistry, McMillan India Ltd., Delhi, 1973, Chapter 2 and references therein.