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Robot: Perubahan kosmetika
* [http://www.invent.org/hall_of_fame/40.html Lee De Forest] at [[National Inventors Hall of Fame]]
* [http://www.youtube.com/watch?v=aZR9KdkMlhM De Forest Phonofilm Sound Movie with Eddie Cantor (1923)]
* [http://web.archive.org/20041206080223/www.geocities.com/lyon95065/Radio.html Stephen Greene's ''Who said Lee de Forest was the "Father of Radio"?'']
* Eugenii Katz's [http://chem.ch.huji.ac.il/~eugeniik/history/deforest.htm Lee De Forest]
* Cole, A. B., "''[http://earlyradiohistory.us/audi1916.htm Practical Pointers on the Audion]: Sales Manager - De Forest Radio Tel. & Tel. Co.''", QST, March, 1916, pages 41–44:
* Hong, Sungook, "''[http://www.ieee.org/organizations/history_center/Che2004/Hong.pdf A History of the Regeneration Circuit: From Invention to Patent Litigation]''" University, Seoul, Korea (PDF)
* [[PBS]], "[http://www.pbs.org/transistor/quicktimes/movieclips/monkeysVIDEO/monkeysVIDEO_MSTR.mov ''Monkeys'']"; a film on the Audion operation ([[QuickTime]] movie)
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