 |
| field force: 18 phrases in 11 subjects |
| Astronomy | 1 |
| Automobiles | 1 |
| Business | 1 |
| Chemistry | 1 |
| Earth sciences | 3 |
| Electronics | 2 |
| Environment | 1 |
| General | 3 |
| Materials science | 1 |
| Optics branch of physics | 1 |
| Physics | 3 |
|
| field force: 18 phrases in 11 subjects |
| Astronomy | 1 |
| Automobiles | 1 |
| Business | 1 |
| Chemistry | 1 |
| Earth sciences | 3 |
| Electronics | 2 |
| Environment | 1 |
| General | 3 |
| Materials science | 1 |
| Optics branch of physics | 1 |
| Physics | 3 |