Avagyan A. ASSESSMENT OF HUMANISTIC PRINCIPLES OF ECOTOURISM IN THE CONTEXT OF SUSTAINABLE DEVELOPMENT. Proc. YSU C: Geol. Geogr. Sci. [Internet]. 2018 Aug. 10 [cited 2024 Sep. 19];52(2 (246):125-32. Available from: https://pub.ysu.am/index.php/proceedings-geol-geogr/article/view/vol52_no2_2018_pp125-132