 |
| recovery method: 51 phrases in 14 subjects |
| Accounting | 4 |
| Economy | 4 |
| Energy industry | 3 |
| European Bank for Reconstruction and Development | 2 |
| General | 1 |
| Geology | 1 |
| Mining | 2 |
| Oil / petroleum | 15 |
| Oil and gas | 7 |
| Oil and gas technology | 3 |
| Oilfields | 3 |
| Programming | 3 |
| Sakhalin | 2 |
| Technology | 1 |