000 00295nam a2200109Ia 4500
008 160122s9999 xx 000 0 und d
041 _aEnglish
100 _aThiagarajan Viswanathan
245 _aTelecommunication Switching Systems and Netwark
260 _bDelhi:Pearson Ed
_c2010
300 _a583p.
999 _c6611
_d6611