==Eksterne henvisninger==
{{Commonscat|Alexander Graham Bell}}
* [http://www.smithsonianmag.com/history-archaeology/We-Had-No-Idea-What-Alexander-Graham-Bell-Sounded-Like-Until-Now-204137471.html May 2013, smithsonianmag.com: We Had No Idea What Alexander Graham Bell Sounded Like. Until Now] {{Webarchive|url=https://web.archive.org/web/20131228090056/http://www.smithsonianmag.com/history-archaeology/We-Had-No-Idea-What-Alexander-Graham-Bell-Sounded-Like-Until-Now-204137471.html |date=28. december 2013 }}, [http://www.smithsonianmag.com/multimedia/audio/204505151.html smithsonianmag.com: Listen to Alexander Graham Bell's Voice]
Historie Teknologi Naturvidenskab