Telephony a detailed exposition of the telephone exchange systems of the British post office
| Autor principal: | |
|---|---|
| Formato: | Libro |
| Lenguaje: | English |
| Publicado: |
London
Pitman
1948, 1958.
|
| Autor principal: | |
|---|---|
| Formato: | Libro |
| Lenguaje: | English |
| Publicado: |
London
Pitman
1948, 1958.
|