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बदलाव

==बाहरी कड़ियाँ==
*[http://books.google.co.in/books?id=Cy4w3h3DNsoC&printsec=frontcover#v=onepage&q=&f=false People, pipes and processes: a short history of chemical engineering and the ...] (गूगल पुस्तक ; लेखक - D. C. Freshwater, Institution of Chemical Engineers (Great Britain))
*[http://www.chemicalengineering.dal.ca/Files/1_-_A_History_of_ChE.ppt रसायन इंजीनियरी का इतिहास] (अंग्रेजी)
*[http://www.thechemicalengineer.com The Chemical Engineer Resource Site]
*[http://www.cheresources.com/indexzz.shtml Chemical Engineers' Resource Page]