Ancy Mol.P,. “Physico-Chemical Characteristics of Surface Water Quality of Urban Ponds in Thiruvananthapuram District, Kerala”. International Journal of Emerging Trends in Science and Technology, Vol. 3, no. 01, Jan. 2016, pp. 3431-7, https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/920.