00793nam0-22002891i-450-99000049081040332120071107130432.0000049081FED01000049081(Aleph)000049081FED0100004908120020821d1973----km-y0itay50------baenga-------001yyNegative electron affinity devicesR. L. BellOxfordClarendon press1973148 p.ill.23 cmMonographs in electrical and electronic engineeringSemiconduttori621.381'52Bell,Robert L.ITUNINARICAUNIMARCBK99000049081040332110 E I 1447863DINELDINELUNINA