The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 516
vFig.Zou.J-lntenna Current \\in.Radiotelephony Transmittingthe]\3ound of a*as in father \) Modulated Radio- frequencyWave which can be received with Simple Detector
Telegraph, Wireless · Radio
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