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出典^ ⇒The Electromagnetic Telegraph, J. B. Calvert, 19 May 2004.
^ ⇒The Atlantic Cable, Bern Dibner, Burndy Library Inc., 1959
^ Antonio Santi Giuseppe Meucci, Eugenii Katz. (Retrieved May, 2006 from ⇒http://chem.ch.huji.ac.il/~eugeniik/history/meucci.html)
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^ Ambardar, Ashok (1999). Analog and Digital Signal Processing (2nd ed.). Brooks/Cole Publishing Company. pp. 1?2. ISBN 0-534-95409-X
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^ Haykin, pp 88-126.
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^ ⇒World Telecommunication Development Report 2003, International Telecommunication Union, 2003.
^ Fischer, Claude S.. "'Touch Someone': The Telephone Industry Discovers Sociability." Technology and Culture 29.1 (Jan., 1988): 32-61. JSTOR. Web. 4 Oct. 2009.
^ “How do you know your love is real? Check Facebook”. CNN. (2008年4月4日). https://edition.cnn.com/2008/LIVING/personal/04/04/facebook.love/index.html
^ ⇒I Just Text To Say I Love You, Ipsos MORI, September 2005.
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