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George Eastman letter to J. Moodie & Sons, dated Eastman Dry Plate and Film Co., Rochester, N.Y., 13
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https://library.si.edu/digital-library/book/georgeeastmanle00east
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Guglielmo Marconi letter to H.H. McClure, dated Marconi's Wireless Telegraph Company, Limited, Table
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https://library.si.edu/digital-library/book/guglielmomarcon00marcl
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Max Planck letter to the Allied Scientific Council, dated Kaiser-Wilhelm-Gesellschaft zur Förderung
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https://library.si.edu/digital-library/book/maxplanckletter00plan
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Marie Curie letter dated Faculté des sciences de Paris, Institut du radium, Laboratoire Curie, 1, R
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https://library.si.edu/digital-library/book/mariecurielette00curia