Kien, Truong, Nguyen Dang Giang Chau, Nguyen Van Hop, & Truong Quy Tung.
" Assessment of Groundwater Quality in Ha Tinh Province  Using Water Quality Index." <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], 41.3 (2025): n. pag. Web.  4 Oct. 2025