TY  - GEN
AU  - Viswanathan, Thiagarajan3879
TI  - Telecommuncation switching systems and networks
SN  - 8120307135
U1  - 621.395.345 
PY  - 1992///
CY  - New Delhi
PB  - Prentice Hall
KW  - Telecommunication- networks
KW  - 621.395.345
ER  -