 |
| |||
| Stephen | |||
| Stefan: 13 phrases in 7 subjects |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Lighting other than cinema | 1 |
| Measuring instruments | 1 |
| Optics branch of physics | 3 |
| Physics | 5 |
|
| |||
| Stephen | |||
| Stefan: 13 phrases in 7 subjects |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Lighting other than cinema | 1 |
| Measuring instruments | 1 |
| Optics branch of physics | 3 |
| Physics | 5 |