00587naa#a2200169#i#450# EN\INFRA-M\bibl\122487 20260518044245.1 1998-0728 20260429b2026####ek#y0engy0150####ca RU Research and Development Activities in Teaching Russian to Primary School Students Journal article Moscow INFRA-M Academic Publishing LLC. 2026 4 с. Journal article local Первая ступень обучения. Начальная школа. 373.3 Romanova V. Yu. naukaru.ru