Sixth plenary assembly : Telegraph operation and tariffs
| Main Author: | International Telegraph And Telephone Consultative |
|---|---|
| Format: | Online |
| Published: |
Geneva : International Telecommunication Union,
1977
|
| Online Access: |
https://consultaredebie.decex.eb.mil.br/pergamum/biblioteca/index.php?codAcervo=416639 |
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