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- 20009553 alternative "Alexanderson system for radio telegraph.".
- 20009553 contributor B597166.
- 20009553 created "1920]".
- 20009553 date "1920".
- 20009553 date "1920]".
- 20009553 dateCopyrighted "1920]".
- 20009553 extent "1 p. l., 55, [1] p.".
- 20009553 issued "1920".
- 20009553 issued "1920]".
- 20009553 language "eng".
- 20009553 publisher "[New York, Radio corporation of America,".
- 20009553 subject "Radio.".
- 20009553 subject "TK5811 .B8".
- 20009553 subject "Telegraph, Wireless.".
- 20009553 title "Technical description of the Alexanderson system for radio telegraph and radio telephone transmission, by Elmer E. Bucher.".
- 20009553 type "text".