000 00293 a2200109 4500
020 _a9780750650458
082 _a621.395.12 LEV
245 _aTelecommunication circuits and technology
_cAndrew Leven
260 _bButterworth Heinemann
_cc2000
300 _aix,387p.
100 _aLeven Andrew
_91338
999 _c1301
_d1301