Secret warfare : the arms and techniques of the resistance / [by] Pierre Lorain ; Engl. addap. by David Kahn elite World War II battlefield communications / by Gordon L. Rottman Kijk! Luister! : film en radio in Nederland onder Duitse dictatuur / Thomas Leeflang High frequency thermionic tubes / A.F. Harvey ; with forew. by E.B. Moullin G.E.C. radio engineering and the war effort : its contribution to victory Radio-ontvangst in theorie en practijk / door R. Swierstra philips technische bibliotheek Gegevens en schakelingen van moderne ontvang- en versterkerbuizen übertragungstechnik im Fernmelde-Weitverkehr / Otto Henkler : Tl. 2 Radio-telefonieprocedure. VS 11-7 Radio-nieuws / Nederlandsche vereeniging voor radio-telegrafie Some effects of obstacles on the propagation of very short radio waves / by E.C.S. Megaw america in a world at war Radio in wartime / by Charles Siepmann
