Nghi, Tran, Dang Mai, Ta Hoa Phuong, Dinh Xuan Thanh, Nguyen Dinh Thai, Nguyen Thanh Lan, & Nguyen Thi Hong. " Projections for Quang Binh tourism and solutions for a sustainable economic development." VNU Journal of Science: Earth and Environmental Sciences [Online], 27.3 (2011): n. pag. Web. 22 Nov. 2024