Communication equipments of Japan / Taizo Ishizaka; The Federation of Japan Electric Communication Industrial Associations
La formation initiale d'un ingenieur dans la domaine des telecommunications / Ecole Nationale Supérieure des Télécommunications de BRetagne
Amateur Communications Receiver (for A-C power supply) model ACR-175 : superheterodyne with beat oscillator, crystal filter and electron-ray tuning and signal-input indicator, eleven tubes 500 to 60,000 kilocycle range / Amateur Radio Section RCA manufacturing company, INC
Aktiebolaget L.M. Ericsson & Co. : telephone instruments, telephonstationen, appareils téléphoniques