ABC das antenas / Gordon J. King; tradução de Eduardo Lúcio Nogueira e Conceição Jardim
Radio Engineering
La radiodiffusion puissance mondiale
Radio-Sciencia : revista de vulgarisação radio-eléctrica / dir. Álvaro Contreiras
Guide to utility stations
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
Radio-frequency electrical measurements : a guide for radio engineering laboratory instruction / Hugh A. Brown