| |||
| charge non permanente (of soil colloids); charge variable (of soil colloids) | |||
|
variable charge : 3 phrases in 2 subjects |
| Communications | 1 |
| Finances | 2 |
| |||
| charge non permanente (of soil colloids); charge variable (of soil colloids) | |||
|
variable charge : 3 phrases in 2 subjects |
| Communications | 1 |
| Finances | 2 |