TY  - BOOK
AU  - Llewellin,F.S.
TI  - The Signaller's manual of practical telegraphy
U1  - 131 
PY  - 1874///
CY  - Bombay
PB  - [s.n.]
KW  - Electronic mail systems
KW  - Evaluation
KW  - Wireless communication systems
ER  -