18 August 1966
| Title | Language | Date |
|---|---|---|
| Circulaire Circ. 920 dd. 18.08.1966 (deel 3) | Dutch | 18-08-1966 |
| Circulaire Circ. 920 dd. 18.08.1966 (deel 2) | Dutch | 18-08-1966 |
| Circulaire Circ. 920 dd. 18.08.1966 (deel 1) | Dutch | 18-08-1966 |
| Circulaire Circ.920 dd. 18.08.1966 (partie 3) | French | 18-08-1966 |
| Circulaire Circ.920 dd. 18.08.1966 (partie 2) | French | 18-08-1966 |
| Circulaire Circ.920 dd. 18.08.1966 (partie 1b) | French | 18-08-1966 |
| Circulaire Circ.920 dd. 18.08.1966 (partie 1a) | French | 18-08-1966 |
