Nguyễn Thị H, Vi Thị N. Exploiting the potential for eco-tourism development in Luc Ngan district, Bac Giang province. SJ TTU [Internet]. 2021Apr.7 [cited 2024May6];6(16):72-9. Available from: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/326