 |
| |||
| primary sources (Published and unpublished records without secondary interpretation or commentary) | |||
| original sources; primary literature | |||
| |||
| primary radiator | |||
| aerial feed; antenna feed | |||
|
sources primaires : 8 Phrasen in 4 Thematiken |
| Energiewirtschaft | 2 |
| Finanzen | 1 |
| Geowissenschaften | 2 |
| Kommunikation | 3 |