TY  - BOOK
AU  - Das, Apurba
TI  - Line communication system:  telecommunication switching approach
SN  - 978-81-224-3088-2
AV  - TK 5103 .D37 2010 
PY  - 2010///
CY  - New Delhi
PB  -  New Age
KW  - Telecommunication Switching Systems
ER  -