Handbook for radio engineering managers / J. F. Ross
L'union internationale de radiodiffusion : Son histoire, Son activité / Union Internationale de Radiodiffusion
Tratado de telegrafía y telefonía : Guía para los empleados de telégrafos y teléfonos / Prof. Dr. Carlos Strecker; Manuel Álvarez Castrillón
model answers to city and guilds of london institute examinations in elementary telecommunications practice : comprising answers to questions in elementary telecommunications practice in the years 1947 to 1955 / Post office electrical engineers' journal