00642naa#a2200193#i#450# EN\\bibl\17742 /en/manage/index 20250127200825.1 1995-042X 20170807b2017####ek#y0engy0150####ca RUS RU THE NEGATIVE ASPECTS OF NATURE-ORIENTED TOURISM Journal article CHERKIZOVO Russian State University of Tourism and Service 2017 11 с. Journal article local Туристско-экскурсионное обслуживание. 71.37 grnti VINOGRADOV Egor S. fht.editorum.ru /en/manage/index