00550naa#a2200157#i#450# EN\\bibl\24409 20250122231343.3 2312-4431 20181227b2018####ek#y0engy0150####ca RU ORTHODOX HOLIDAYS IN INSTITUTIONS OF ADDITIONAL EDUCATION Journal article Cheboksary Non-state educational private institution of additional professional education "Expert-methodological centre" 2018 5 с. Journal article local Vatolkina Angelina Nikolaevna naukaru.ru