000 00320nam a2200133Ia 4500
005 20260413101309.0
008 230516s9999||||xx |||||||||||||| ||und||
100 _aSingh RP
245 0 _aCommunication Systems
260 _bN Delhi Tata Mcgrew hill
_c2007
300 _a584
942 _cGB
999 _c9534
_d9534