00823nam0-22003011i-450-99000049864040332120080303114808.0000049864FED01000049864(Aleph)000049864FED0100004986420020821d1957----km-y0itay50------baenga-------001yyElectrical discharges in gasesF. M. PenningNetherlandPhilips' Gloeilampenfabrieken195775 p.ill.24 cmPhilips' technical libraryScariche elettriche537.533Penning,F. M.ITUNINARICAUNIMARCBK99000049864040332110 C I 483604DINEL10 C I 493833DINELDINELUNINA