TY  - BOOK
AU  - Viswanathan,Thiagarajan
TI  - Telecommunication switching systems and networks / 
SN  - 8120307135
U1  - 621.382 
PY  - 2004///
CY  - New Delhi : 
PB  - Prentice Hall of India , 
KW  - TELECOMMUNICATIONS
N1  - Includes index
ER  -