00473naa#a2200157#i#450# EN\\bibl\37287 20240427063629.6 2500-3372 20200423b2020####ek#y0engy0150####ca RU Classification of Ecotourism Objects and its Perspective in Azerbaijan Journal article Kemerovo Kemerovo State University 2020 8 с. Journal article local Khalilov H. A. vestnik-pses.kemsu.ru