000 00336nam a2200133Ia 4500
005 20260413101025.0
008 230516s9999||||xx |||||||||||||| ||und||
100 _aGnanasivam P
245 0 _aTelecommunication switching & Networks
260 _bN Delhi New Age Int
_c2006
300 _a324
942 _cGB
999 _c6211
_d6211