TY  - GEN
ED  - American Telephone  Telegraph
TI  - Principles of Electricity: Applied to telephone and telegraph work / 
U1  - 621.384 15 
PY  - 1939///0000
CY  - U.S.A., 
PB  - American Telephone Telegraph
KW  - ELECTRICIDAD-TRANSMISION
KW  - TELECOMUNICACIONES
N1  - Texto en Biblioteca Central
ER  -