Ngoc Sang, Huynh. “THE ROLE OF PH IN TREATING OF GROUND WATER AND MANY FILTER MODELING BY THE NATURAL INORGANIC MATERIALS”. Science and Technology Development Journal 7, no. 2 (February 29, 2004): 58-64. Accessed November 26, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3165.