“Groundwater Quality Assessment by WQI and GIS Tools in the Villages of Bukkapatnam Mandal, Anantapur District, Andhra Pradesh (India)”. International Journal of Advance Engineering and Research Development (IJAERD) 2, no. 4 (April 25, 2015): 537–544. Accessed July 28, 2025. https://ijaerd.org/index.php/IJAERD/article/view/697.