S. Arasaretnam, H.R.P. Prasadini, & K. Venujah. (2018). Assessment of Open well Water Quality around Puttalam District, Sri Lanka. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 4(12), 225–232. https://doi.org/10.31695/IJASRE.2018.33024