 |
| |||
| primary sources (Published and unpublished records without secondary interpretation or commentary) | |||
| original sources; primary literature | |||
| |||
| primary radiator | |||
| aerial feed; antenna feed | |||
|
sources primaires : 8 phrases, 4 sujets |
| Communications | 3 |
| Finances | 1 |
| Industrie de l'énergie | 2 |
| Sciences de la Terre | 2 |