000 00401 a2200157 4500
020 _a8178083280
082 _a621.382
_bCOU
090 _c3622
_d4479
100 _aCouch, Leon W.
245 _aDigital and analog communication systems
250 _a6th.
260 _aSingapore
_bPearson Education
_c2001
_g2001
300 _axxv, 758p.
_c24cm.
650 _aCOMMUNICATIONS ENGINEERING
942 _cSR
999 _c32621
_d32621