00491naa#a2200169#i#450# EN\INFRA-M\bibl\25 20250109183145.4 2306-1731 20121030b2012####ek#y0engy0150####ca RUS RU From the experience of organizing activities for high school students Journal article Moscow INFRA-M Academic Publishing LLC. 2012 0 с. Journal article local Kalney Vladimir zh-szf.ru