000 00318nam a22001217a 4500
999 _c5907
_d5907
003 OSt
005 20210307142147.0
008 210307b ||||| |||| 00| 0 eng d
100 _aTHIAGARAJAN VISHWANATHAN
245 _aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS
260 _aNEW DELHI
_bPHI
_c2008
942 _2ddc
_cGE