Ladawan:A group of young men learning Morse code.jpg
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presente | 22:00, 2 Abril 2023 | 3,059 × 1,669 (2.79 MB) | Bri | Uploaded a work by Lescarboura, Austin C. (Austin Celestin), 1891- from Derived from File:File:Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to (14755529704).jpg originally published 1922 with UploadWizard |
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