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Alexander Graham Bell makes 1st sound transmission, June 2, 1875 - EDN
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Induction balance hi-res stock photography and images - Alamy
Alexander Graham Bell - Wikipedia
January 25, 1915: Alexander Graham Bell, in New York, Speaks on the Telephone With Thomas Watson, in San Francisco | The Nation
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Bell continued to experiement until, one day, he heard Watson's voice on a receiver (colour litho)
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Alexander Graham Bell: Telephone & Inventions - HISTORY - HISTORY
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Alexander Graham Bell | Biography, Education, Telephone, Inventions, & Facts | Britannica
Alexander Graham Bell - Wikipedia
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Alexander Graham Bell,Unveiling of Plaque,1876 Invention of Telephone,Boston,MA | eBay
Alexander Graham Bell - Wikipedia
ALEXANDER GRAHAM BELL Telephone Invention 1877 Magazine | #96479633
