000 00366nam a2200133Ia 4500
008 241227s9999 xx 000 0 und d
020 _a8120307135
082 _a621.382
_bVIS
100 _aViswanathan, Thiagarajan.
245 0 _aTelecommunicationh switching systems and netwoks
260 _aNew Delhi :
_bPhi,
_c2014
300 _a583.
650 _aApplied physics
999 _c154856
_d154856