Thi Anh Thi Nguyen, and Ngoc Han Bui. “The Zoning of Surface Water Quality by WQI Index in the Tien Giang Province, Vietnam”. Vietnam Journal of Science, Technology and Engineering, vol. 62, no. 4, Dec. 2020, pp. 71-76, doi:10.31276/VJSTE.62(4).71-76.