Nguyen, Giao. 2020. “EVALUATING SURFACE WATER QUALITY AND TESTING FREQUENCY IN TIEN AND HAU RIVERS, AN GIANG PROVINCE, USING 10-YEAR MONITORING DATA”. TRA VINH UNIVERSITY JOURNAL OF SCIENCE 10 (37), 78-88. https://doi.org/10.35382/18594816.1.37.2020.379.