000 00317nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aThiagarajan Viswanathan
245 0 _aTelecommunication switching systems and networks
250 _a1
260 _bPrentice Hall Of India
_c2004
942 _cBK
999 _c5417
_d5417