TY  - BOOK
AU  - Dhingra,P.L.
TI  - Master telegraph: a comprehensive and practical...
U1  - 621.382 
CY  - Delhi
PB  - Asia Book Centre
KW  - Telecommuniction
KW  - Telegraph
KW  - Telegraph lines
KW  - Design and construction
N1  - Library has Vol. 1-3; Vol. 1 -v.2 -v. 3, 1961
ER  -