000 00312nam a2200133Ia 4500
020 _a0070629552
100 _aHerbert Taub
245 _aPrinciples of communication systems
250 _a2
260 _c1994
_bTATA McGRAW HILL
_aNew Delhi
300 _axvii+759
700 _a Donald L Schilling
942 _cBK
999 _c23546
_d23546