TY  - BOOK
AU  - Das,P.N.
TI  - Line telegraphy
U1  - 621.382 
PY  - 1974///
CY  - Calcutta
PB  - Modern Book Agency
KW  - Telegraph lines
KW  - Telegraph wires
KW  - Telegraph
KW  - Design and constructions
N1  - Includes index; Bibliography: p. 197 -198
ER  -