TY  - BOOK
AU  - Viswanathan , Thiagarajan.
TI  - Telecommunication switching systems and networks
SN  - 9788120307131 
U1  - 621.383 
PY  - 1994///
CY  - New Delhi
PB  - Prentice Hall Of India PvtLtd
KW  - Applied physics
ER  -