TY  - GEN
TI  - Instruction in Army telegraphy and telephony Vol. 1
U1  - 621.383,ARM 
PY  - 1914///
CY  - Dublin
PB  - H.M stationary office 
KW  - Telecommunication engineering
N1  - Elementary theory (Page-7), Batteries (Page-37), Galvanometers and simple telegraph circuits (Page-57), Relays and single current working (Page-72), Double current working (Page-81), Translation (Page-87), High speed wheatstone automatic system (Page-115), Telephone accessories (Page-203), Testing (Page-257), Method of delaying with messages, office routine and organization (Page-296)
ER  -