TY  - BOOK
AU  - Biswas, Nripendra N. 
TI  - Principles of telegraphy
SN  - 0862492459
U1  - 621.382 B545p 
PY  - 1964///
CY  - Bombay
PB  - Media Promoters & Publishers Pvt. Ltd.
KW  - Telegraph
ER  -