| |||
| система научно-технической информации | |||
|
system of scientific and technical information : 2 Phrasen in 2 Thematiken |
| Erdöl | 1 |
| Patente | 1 |
| |||
| система научно-технической информации | |||
|
system of scientific and technical information : 2 Phrasen in 2 Thematiken |
| Erdöl | 1 |
| Patente | 1 |