00523naa#a2200169#i#450# EN\\bibl\10490 20260208081034.7 1995-042X 20150316b2015####ek#y0engy0150####ca RUS RU Regulation of the system of children and youth tourism for sustainable development Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 14 с. Journal article local Rassokhina Tatyana zh-szf.ru