000 00292nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aSapre S D
245 0 _aCommunication systems ; Analog and digital
250 _a1
260 _bTata Mcgraw Hill
_c2003
942 _cBK
999 _c6281
_d6281