00634naa#a2200169#i#450# EN\INFRA-M\bibl\47196 20240628220722.5 2500-3305 20211111b2021####ek#y0engy0150####ca RU Extracurricular Activities of Students as an Object of Project Management in a Secondary School Journal article Moscow INFRA-M Academic Publishing LLC. 2021 4 с. Journal article local Образование. Воспитание. Обучение. Организация досуга. 37 Zemlyanskaya Elena Nikolaevna zh-szf.ru