 |
| investigation: 25 phrases in 13 subjects |
| Education | 1 |
| Electric traction | 1 |
| Fish farming pisciculture | 1 |
| General | 7 |
| Law | 7 |
| Life sciences | 1 |
| Medical | 1 |
| Nuclear and fusion power | 1 |
| Pharmacy and pharmacology | 1 |
| Politics | 1 |
| Social science | 1 |
| Transport | 1 |
| United Nations | 1 |