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Letter from Alexander Graham Bell to Gardiner Greene Hubbard, February 15, 1877

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lectures and lecturing telephone companies telephone experiments diaphragms correspondence letter alexander graham bell alexander graham bell gardiner greene hubbard gardiner greene hubbard high resolution
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Date

01/01/1877
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Bell, Alexander Graham
Hubbard, Gardiner Greene
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Library of Congress
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http://www.loc.gov/
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lectures and lecturing telephone companies telephone experiments diaphragms correspondence letter alexander graham bell alexander graham bell gardiner greene hubbard gardiner greene hubbard high resolution