00631naa#a2200169#i#450# EN\INFRA-M\bibl\44472 20240522092140.3 2587-9103 20210623b2021####ek#y0engy0150####ca RU Sociocultural Factors Affecting the Development of Speech in Russian of Students in Grades 5–7th of Schools of Indigenous Small Peoples of the North Journal article Moscow INFRA-M Academic Publishing LLC. 2021 5 с. Journal article local Лингвистика. Языкознание. Языки. 81 Popova M. K. naukaru.ru