00835nam0-22002891i-450-990000013710403321000001371FED01000001371(Aleph)000001371FED0100000137120011111d--------km-y0itay50------baitay-------001yyMaterials and techniques for electron tubesWalter H. Kohl.New YorkReinhold publishing corporation1960XVIII, 638 p.ill.24 cmValvole termoioniche621.381Kohl,Walter H.1123ITUNINARICAUNIMARCBK99000001371040332113 C 14 0823852FINBCFINBCMaterials and techniques for electron tubes108227UNINAING01