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File:Invitation from Theodore N. Vail to Alexander Graham Bell, 1915 - Transcription LOC 0001i.jpg - Wikimedia Commons
Alexander Graham Bell made the world's first telephone call 145 years ago in Boston - The Boston Globe
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Alexander Graham Bell - Erfinder des ersten funktionsfähigen Telefons - Medienwerkstatt-Wissen © 2006-2023 Medienwerkstatt
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