11 June 1957
| Title | Language | Date |
|---|---|---|
| Nummer R 197/01-01 | Dutch | 11-06-1957 |
| Nummer R 199/09-01 | Dutch | 11-06-1957 |
| Nummer R 194/02-01 | Dutch | 11-06-1957 |
| Numéro E 197/01-01 | French | 11-06-1957 |
| Numéro E 199/09-01 | French | 11-06-1957 |
| Numéro E 194/02-01 | French | 11-06-1957 |
