C, Prabhahar. “Seasonal Variations in Physico-Chemical Parameters of Vellar River, Vellar Estuary and Portonovo Coastal Waters, South East Coast of India”. International Journal of Pharmaceutical & Biological Archive 2, no. 6 (January 23, 2012). Accessed August 5, 2025. http://mail.ijpba.info/index.php/ijpba/article/view/483.