Resistors : fixed and variable Inter-service specification K.114, issue 2 : climatic and durability testing of service telecommunication equipment / Ministry of Supply Radio engineering / by Frederick Emmons Terman Measurements in radio engineering / by Frederick Emmons Terman Communication engineering / by William Littell Everitt nieuwe handboek der radiotechniek / door A. Dominicus van den Berg Products in picture / Philips Telecommunication Industries/Philips Telecommunicatie Industrie Principles of aeronautical radio engineering / by P.C. Sandretto eigen aard van militaire telecommunicatie / door P.C. van der Geest Orthogonaliteit, een zinvol element in de communicatie?" / A. Kok radio communication series Radio direction finders / by Donald S. Bond monographien der elektrischen nachrichtentechnik Theorie der Spulen und übertrager / von Richard Feldtkeller