00500naa#a2200169#i#450# EN\INFRA-M\bibl\113 20240916160406.1 2305-7807 20130212b2013####ek#y0engy0150####ca RUS RU Enviroment as a factor of integration of general and additional education Journal article Moscow INFRA-M Academic Publishing LLC. 2013 0 с. Journal article local Stulovskaya Natalya zh-szf.ru