00798nam0-22002891i-450-99000049015040332120071108141820.0000049015FED01000049015(Aleph)000049015FED0100004901520020821d1969----km-y0itay50------baenga-------001yyFilter design and evaluationGrant E. HansellNew YorkVan Nostrand Reinhold1969203 p.ill.28 cmFiltri elettrici621.381'532Hansell,Grant E.26569ITUNINARICAUNIMARCBK99000049015040332110 E I 2016576DINELDINELFilter design and evaluation332710UNINA