Paperback
ISBN: 978-92-61-01641-8
ISBN-10: 92-61-01641-3
The Union ยท 1983
| See also: | ||
| 1984 | Paperback | Twenty-third report (Booklet / International Telecommunication Union) |
| 1982 | Paperback | Twenty-first report (Booklet / International Telecommunication Union) |