 |
| |||
| Mississippian period (евр) | |||
| Lower Carboniferous (MichaelBurov); Lower Carbon (MichaelBurov) | |||
| нижний карбон: 7 phrases in 3 subjects |
| Drilling | 1 |
| Geology | 5 |
| Mining | 1 |
|
| |||
| Mississippian period (евр) | |||
| Lower Carboniferous (MichaelBurov); Lower Carbon (MichaelBurov) | |||
| нижний карбон: 7 phrases in 3 subjects |
| Drilling | 1 |
| Geology | 5 |
| Mining | 1 |