L'union internationale de radiodiffusion : Son histoire, Son activité / Union Internationale de Radiodiffusion
International cabel directory of the world in conjuction with western union telegraphic code system / International Cable Directory Company
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
model answers to city and guilds of london institute examinations in telecommunications principles II : including answers to similar questions in technical electricity, transmission and lines, and radio communication / Post office electrical engineers' journal