TY  - BOOK
AU  - Biswas, N.N., Au.
TI  - Principles of telegraphy
U1  - 621.382 
PY  - 1966///
CY  - Bombay
PB  - Asia Publishing House
N1  - Dormitory:107010@ADormitory:98952@ADormitory:117744@ADormitory:76049@ADormitory:117743
ER  -