 |
| |||
| selbstreinigend | |||
| self -purifying: 7 phrases in 3 subjects |
| Environment | 4 |
| General | 1 |
| Natural resourses and wildlife conservation | 2 |
|
| |||
| selbstreinigend | |||
| self -purifying: 7 phrases in 3 subjects |
| Environment | 4 |
| General | 1 |
| Natural resourses and wildlife conservation | 2 |