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| Eozoic | |||
| Pre-Cambrian; Archaean; Archean; pre-Cambrian (MichaelBurov); Precambrian (редк. MichaelBurov) | |||
| pree-Cambrian | |||
| Precambrian | |||
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докембрийский : 48 phrases in 7 subjects |
| Evolution | 2 |
| Geochronology | 35 |
| Geology | 5 |
| Geophysics | 1 |
| Mining | 1 |
| Oilfields | 2 |
| Technology | 2 |