000 00288nam a22001217a 4500
999 _c452901
_d452901
020 _a9789812406118
082 _a621382752
100 _aBLAKE,Roy
245 _aElectronic communication systems
250 _asecond edition
260 _asingapore
_bThomson learning
_c2002
942 _cBK