TY  - BOOK
AU  - Biswas N.N.
TI  - Principles of Telegraphy
SN  - 8185099049
SN  - 1343
U1  - 621.383             
PY  - 1964///
CY  - Bombay
PB  - Media Promoters & Publishers Pvt. Ltd.
KW  - Telegraphy 621.383
ER  -