000 00295nam a2200121Ia 4500
020 _a0471443042
100 _aJohnson David E
245 _aRapid practical designs of active filters
260 _c1975
_bJOHN WILEY AND SONS
_aNew York
300 _aix+264
700 _aHilburn John L
942 _cBK
999 _c6830
_d6830