TY  - GEN
AU  - Thiagarajan Visuvanathan
TI  - Tele Communication Switching Systems
T2  - 23036
SN  - 9788120307131
U1  - 621.382 
PY  - 2010///
CY  - New Delhi
PB  - PHI Learning
KW  - Tele Communication
ER  -