 |
| |||
| метод Фраша (bse.sci-lib.com/article117496.html Jespa) | |||
|
Frasch : 3 phrases, 2 sujets |
| Exploitation minière | 1 |
| Technologie | 2 |
|
| |||
| метод Фраша (bse.sci-lib.com/article117496.html Jespa) | |||
|
Frasch : 3 phrases, 2 sujets |
| Exploitation minière | 1 |
| Technologie | 2 |