TY  - BOOK
AU  - Biswas N.N.
TI  - Principles of Telegraphy
SN  - 0000002343
U1  - 621.382 
PY  - 1964///
CY  - New Delhi
PB  - Asian Publishing House, NewDelhi
KW  - Civil Engineering
KW  - Principles  Telegraphy
ER  -