NGUYỄN, K. H.; NGUYỄN, P. T.; NGUYỄN, V. H. Ecotourism development in Tuyen Quang: case study of Lam Binh District. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, [S. l.], v. 4, n. 10, p. 61–67, 2021. DOI: 10.51453/2354-1431/2018/196. Disponível em: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/196. Acesso em: 5 may. 2024.