 |
| couche de séparation: 4 phrases in 4 subjects |
| Astronautics | 1 |
| Geology | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil and gas technology | 1 |
|
| couche de séparation: 4 phrases in 4 subjects |
| Astronautics | 1 |
| Geology | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil and gas technology | 1 |