Gyawali, Saroj, Kuaanan Techato*, Chumpol Yuangyai, and Sathaporn Monprapusson. 2018. “Evaluation of Surface Water Quality using Multivariate Statistical Techniques: A Case Study of U-tapao River Basin, Thailand”. CURRENT APPLIED SCIENCE AND TECHNOLOGY 12 (1). Bangkok, Thailand:7-20. https://li01.tci-thaijo.org/index.php/cast/article/view/136294.