 |
| |||
| progres tehnico-științific | |||
|
scientific and technical progress : 12 phrases, 3 sujets |
| Environnement | 2 |
| Politique | 4 |
| Sciences naturelles | 6 |
|
| |||
| progres tehnico-științific | |||
|
scientific and technical progress : 12 phrases, 3 sujets |
| Environnement | 2 |
| Politique | 4 |
| Sciences naturelles | 6 |