000 00284nam a2200109Ia 4500
008 230718s9999||||xx |||||||||||||| ||und||
082 _a621.38
100 _aVISHWANATHAN
245 0 _aTELE COMMUNICATION SWITCHING: SYSTEM AND NETWORKS
260 _bP H I
_c2001
_aDELHI
300 _a583
999 _c38956
_d38956