00656naa#a2200193#i#450# EN\INFRA-M\bibl\20080 20240714055102.7 2306-1731 20180426b2018####ek#y0engy0150####ca RUS RU Readiness of a Teenager for Self-Development and Its Formation in Conditions of Additional Education Journal article Moscow INFRA-M Academic Publishing LLC. 2018 6 с. Journal article local Статистика. Демография. Социология. 31 RUS Ivanova Irina Viktorovna Makarova V. A. naukaru.ru