Akther MSR, Tharani G. Assessment of Water Quality Parameters and Determination of Water Quality Index of Tube Well Water in Vengalacheddikulam DS Division,Vavuniya District, Sri Lanka. IJSBAR. 2017;32(3):317-328. Accessed September 13, 2025. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7113