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- 18010420 contributor B573869.
- 18010420 created "1918.".
- 18010420 date "1918".
- 18010420 date "1918.".
- 18010420 dateCopyrighted "1918.".
- 18010420 extent "4 p. l., 298, 14 p.".
- 18010420 issued "1918".
- 18010420 issued "1918.".
- 18010420 language "eng".
- 18010420 publisher "Chicago, American technical society,".
- 18010420 subject "TK5742 .H3".
- 18010420 subject "Telegraph, Wireless.".
- 18010420 title "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 ...".
- 18010420 type "text".