TY  - BOOK
AU  - Das,P.N.
TI  - Line telegraph
U1  - 621.382 
PY  - 1965///
CY  - Calcutta
PB  - Modern Book Agency
KW  - Telegraph
KW  - Telecommunication
KW  - Telegraph wire
KW  - Telegraph lines
KW  - Design and constructions
N1  - Includes index; Bibliography: p. 191 -192
ER  -