Tham, Trinh Thi, Do Thi Hien, Nguyen Thuy Chung, & Ngo Tra Mai. " Assessment of Groundwater Quality in the Holocene Aquifer in Duy Tien District, Ha Nam Province using Groundwater Quality Index (GWQI)." VNU Journal of Science: Earth and Environmental Sciences [Online], 38.1 (2022): n. pag. Web. 24 Nov. 2024