Akther, M. S. R., and G. Tharani. 2017. “Assessment of Water Quality Parameters and Determination of Water Quality Index of Tube Well Water in Vengalacheddikulam DS Division,Vavuniya District, Sri Lanka”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 32 (3):317-28. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7113.