How to become a wireless operator;
a practical presentation of the theory of electrial waves, their propagation, and their adaptation to wireless communication, including simple and clear instructions how to operate wireless devices and how to comply with government requirements for operators, by Charles B. Hayward ...
|Main Author:||Hayward, Charles B. 1876-|
Chicago, American technical society, 1918.
4 p. ℓ., 298, 14 p.
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||New York Public Library|