Medalla Elliott Cresson: diferència entre les revisions

<ref name="bio">The Franklin Institute. Donors of the Medals and their histories. [http://www.fi.edu/learn/case-files/bell/cresson_bio.pdf ''The Elliott Cresson Medal - Founded in 1848 - Gold Medal'']. RetrievedConsultat on July 13, 2009.</ref>

<ref name="facts">The Franklin Institute. Awards. [http://www.fi.edu/franklinawards/about.html ''About the Awards: History and Facts''], RetrievedConsultat on July 13, 2009.</ref>

<ref name="winners">The Franklin Institute. Winners. [http://www.fi.edu/winners/show_results.faw?gs=&ln=&fn=&keyword=&subject=&award=CRESS&sy=&ey=&max=300&name=Submit ''Cresson Medal winners'']. Note that the 269 listed awardees include two different entries for Lee DeForest, with different spellings of his name. DeForest received only one medal, in 1923. RetrievedConsultat on July 13, 2009.</ref>