transmissions dans l'infanterie / Lieutenant Vignollet Tele-communication engineers' instrument manual / by Paul H. Hunter Liste des fréquences / publiée par le bureau de l'union internationale des télécommunications Inter-service specification K.114, issue 2 : climatic and durability testing of service telecommunication equipment / Ministry of Supply Radio engineering / by Frederick Emmons Terman Communication engineering / by William Littell Everitt nieuwe handboek der radiotechniek / door A. Dominicus van den Berg Principles of aeronautical radio engineering / by P.C. Sandretto radio communication series Radio direction finders / by Donald S. Bond Reference data for radio engineers Reference data for radio engineers 1948 radio catalog / French-van Breems
