International Telecommunication Union · Union internationale des télécommunications
| title | ISBN-13 | year of publication |
|---|---|---|
| Itu Global Directory | 978-92-61-05217-1 | 2000 |
| Itu Global Directory | 978-92-61-05897-5 | 2000 |
| Itu Global Directory | 978-92-61-06337-5 | 2000 |
| Itu Statistical Yearbook 1993/covers 1986-1993 | 978-92-71-20061-6 | 2000 |
| Itu Statistical Yearbook 1994/covers 1987-1994 | 978-92-71-21061-5 | 2000 |