Umekenova O.B. 
Private Educational Institution “Stupeni”
Moscow
Umekenova O.B. — Teacher of Geography and Biology, Private Educational Institution “Stupeni”, Moscow, Russian Federation.
All articles by this author
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Private Educational Institution “Stupeni”
Moscow
Umekenova O.B. — Teacher of Geography and Biology, Private Educational Institution “Stupeni”, Moscow, Russian Federation.
All articles by this author