00908nam0-22003131i-450-99000049171040332120071025113003.0000049171FED01000049171(Aleph)000049171FED0100004917120020821d1948----km-y0itay50------baenga-------001yyVacuum tube amplifiersEdited by George E. Valley, Henry WallmanNew YorkMcGraw-Hill1948743 p.ill.24 cmRadiation laboratory series18Amplificatori a valvola elettronica621.381'535Valley,George E.26637Wallman,Henry51049ITUNINARICAUNIMARCBK99000049171040332110 D III 632878DINELDINELVacuum tube amplifiers333019UNINA