| Journal Call no. | QA75.5.H66 |
|---|---|
| Author | Campbell, Everard. |
| Article Title | New tone to herald duplex ringing / Everard Campbell. |
| Is Part Of | Hong Kong computer journal ; v.6, no.11, Nov 1990, p.17-18, illus. |
| Abstract | Telecommunications. |
| Journal Call no. | QA75.5.H66 |
|---|---|
| Author | Campbell, Everard. |
| Article Title | New tone to herald duplex ringing / Everard Campbell. |
| Is Part Of | Hong Kong computer journal ; v.6, no.11, Nov 1990, p.17-18, illus. |
| Abstract | Telecommunications. |