Media type: Article Title: Edwin H[oward] Armstrong : Erfinder d. Superheterodyn-Empfängers u. d. Breitband-Frequenzmodulation Contributor: Goebel, Gerhart W. [Author] imprint: 1975 Published in: Funkschau ; 47(1975), 21, Seite 77-78 Language: German ISSN: 0016-2841 Keywords: Armstrong, Edwin Howard Origination: Footnote: