000 00395nam a2200133Ia 4500
008 210219s9999||||xx |||||||||||||| ||und||
082 _a621.3851
_bA266T
100 _aViswanathan,Thiarajan
245 0 _aTelecommunication switching systems and networks
_cThiarajanViswanathan
260 _aNew Delhi
_bPrentice Hall of India
_c1992
300 _axviii,556
942 _cBK
950 _o621.3851 A266T
999 _c2159
_d2159