Noerul Hanin, and Dyan Puji Lestari. “Determination of Nitrite in the Kapuas Besar River by Spectrophotometric Method”. Proceeding International Conference on Religion, Science and Education 2 (April 26, 2023): 795–800. Accessed July 21, 2026. http://sunankalijaga.org/prosiding/index.php/icrse/article/view/998.