Firdaus ML, Yuliafitri S, Swistoro E, Ghufira G, Wardana RW. Implementation of discovery learning on electromagnetic wave material based on adsorption Congo Red by silica from Bengkulu beach sand. JSER [Internet]. 2019 Nov. 11 [cited 2026 Sep. 4];3(2):103-7. Available from: https://jurnal.uny.ac.id/index.php/jser/article/view/30627