Tran Xuan Mui. “BUILDING UP A NATURAL SYNTHESIS SLICE AT PHONG NHA - KE BANG NATIONAL PARK ”. UED Journal of Social Sciences, Humanities and Education 7, no. 2 (June 29, 2017): 5-11. Accessed May 20, 2024. https://jshe.vn/index.php/jshe/article/view/761.