| |||
| Umkehr inversion technique; inversion technique; Umkehr method; Umkehr technique | |||
|
technique Umkehr : 5 phrases in 1 subject |
| Environment | 5 |
| |||
| Umkehr inversion technique; inversion technique; Umkehr method; Umkehr technique | |||
|
technique Umkehr : 5 phrases in 1 subject |
| Environment | 5 |