Đỗ Tuyết N. The potentials for developing trekking tour in Xuan Son national park, Phu Tho province. SJ TTU [Internet]. 2020Dec.8 [cited 2024May10];5(12):98-102. Available from: http://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/249