 |
| |||
| observatiehuis n; observatietehuis n | |||
| observation centre: 5 phrases in 3 subjects |
| Astronautics | 3 |
| Environment | 1 |
| Social science | 1 |
|
| |||
| observatiehuis n; observatietehuis n | |||
| observation centre: 5 phrases in 3 subjects |
| Astronautics | 3 |
| Environment | 1 |
| Social science | 1 |