TY  - BOOK
AU  - BISWAS, N N
TI  - Principles of Telephony
U1  - 621.385 
PY  - 1988///
CY  - Bangalore
PB  - Radiant Books
KW  -  TELEPHONE INSTRUMENTS
KW  -  MANUAL TELEPHONY
KW  -  ELECTRONICS AND COMMUNICATION ENGINEERING
KW  - MICROELECTRONICS

COMMUNICATION
ER  -