000 00257 a2200085 4500
100 1 _aAckroyd, Martin H..
_eAutor
245 0 _aDigital Filters /
_cAckroyd Martin H..
710 2 _aButterworths.
_eWydawca
_4pbl
260 _aLondon :
_bButterworths,
_c1973.
300 _aVII, 82 s.;
_c24 cm.
999 _c2839
_d2839