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| series of studies (A series of studies recently conducted in the U.K. suggests space aliens are investing in local real estate. ART Vancouver); series of inquiries (misha-brest) | |||
| a number of studies (Alex_Odeychuk); number of studies (Konstantin 1966) | |||
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ряд исследований : 6 phrases in 5 subjects |
| Economics | 1 |
| General | 1 |
| Makarov | 1 |
| Metrology | 1 |
| Scientific | 2 |