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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 do fraz, 5 tematyki |
| Ekonomia | 1 |
| Makarowa | 1 |
| Metrologia | 1 |
| Naukowy | 2 |
| Pospolicie | 1 |