000 002880000a22001330004500
245 _aElectronic filters
110 _aIEE
260 _aLondon
_bIEE
_c1978
440 _aIEE conference publication
440 _aNo. 167
080 _a621.3(063)
_bI6
041 _aEN
942 _cBK
999 _c113506
_d113506