 |
| |||
| tula formation (Madi Azimuratov) | |||
| Tula shale (Aiduza); tula formation (Madi Azimuratov); tula bed (Madi Azimuratov) | |||
| тульский горизонт: 4 phrases in 2 subjects |
| Karachaganak | 3 |
| Oil and gas | 1 |
|
| |||
| tula formation (Madi Azimuratov) | |||
| Tula shale (Aiduza); tula formation (Madi Azimuratov); tula bed (Madi Azimuratov) | |||
| тульский горизонт: 4 phrases in 2 subjects |
| Karachaganak | 3 |
| Oil and gas | 1 |