TY  - BOOK
AU  - Biswas, N N
TI  -  Principals of Telegraphy
SN  - 81-85099-04-9
U1  - 21.382 
PY  - 1996///
CY  - Bombay
PB  - Media Promoters and Publishers Pvt Ltd
KW  - Telegraph Codes
KW  - Telegraph Instruments and Relays
N1  - Index,
ER  -