TY  - BOOK
AU  - Viswanathan, Thiagarajan.
AU  - Bhatnagar Manav.
TI  - Telecommunications switching systems and networks
SN  - 9788120350830
AV  - 23928-23929 
U1  - 621.382 22
PY  - 2020///
CY  - Delhi
PB  - PHI Learning Pvt. Ltd.
N1  - Includes index
ER  -