TY  - BOOK
AU  - Welch, Samuel,
TI  - Signalling in telecommunications networks
T2  - Iee telecomunications series
SN  - 0906048044
AV  - TK6392 W45
PY  - 1981///
CY  - London
PB  - P. peregrinus on behalf of the institution of electrical engineers
KW  - Teléfono
KW  - Transmision de señales
ER  -