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| Ret Documents |
| Chronologie tlc |
| Chronologie télégraphes |
| Chronologie téléphone |
| Chronologie radio |
| Chronologie TV |
| Chronologie comp. |
| Index Scientifiques |
| Bibliographies |
| Glossaire |
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Samuel
Finley Breese Morse
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DOCUMENTS
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| Lettres du frère Sidney Edwards Morse 23 février 1843 | |
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| [Letter from Samuel F.B. Morse to his brother, Sidney Edwards Morse, announcing the passing of the appropriation bill, 23 February 1843] Bound volume---20 June 1842-12 September 1843 | |