KRISHNA, Darapureddi, and Ravi Padma SREE. “Response Surface Modeling and Optimization of Chromium (VI) Removal from Waste Water Using Custard Apple Peel Powder”. Walailak Journal of Science and Technology (WJST) 11, no. 6 (October 30, 2013): 489–496. Accessed April 30, 2024. https://wjst.wu.ac.th/index.php/wjst/article/view/595.