TY  - BOOK
AU  - Biswas,Nripendra N.
TI  - Principles of telegraphy
SN  - 0-210-98177-6
U1  - TBB D66,47 K4;15 
PY  - 1964///
CY  - Bombay
PB  - Asia publishing house
N1  - Includes Appendix and Index
ER  -