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1961 - Telephoning without wires. The Poulsen System. The Illustrated London News. Mayo, 1908
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1959 - Wireless Telephony for the United States Navy. The Audion De Forest (1), 1907
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1812 - Sintonizador amateur. Transformador de antena con control de acoplamiento y preselección de inductancia (1), 1915-22
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1850 - Antonio Castilla López. El Telegráfo Español. Mayo, 1920
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1644 - The How and Why of Radio Apparatus, Detectors. Electrical Experimenter, 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (1), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (2), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (3), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (4), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (5), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (6), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (7), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (8), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (9), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (12), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (13), 1918
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1813 - The Principles Underlying Radio Communication. Signal Corps, U.S. Army (14), 1918
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1841 - Compañia Ibérica de Telecomunicación. Estaciones para la marina, 1919
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1814 - La radiotelecomunicación. Sus fundamentos, su progreso, su porvenir. El Sol. 3 Octubre (1), 1919
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1800 - Westinghouse RA-DA. Receptor de radio onda media (180-700m) de realimentación regenerativa y amplificador audio (1), 1921
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1800 - Westinghouse RA-DA. Receptor de radio onda media (180-700m) de realimentación regenerativa y amplificador audio (2), 1921
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