Rahayu M, Sholeha NA, Rahmah S. Characterization of Natural Clay from Tulungagung Regency, East Java Province, Indonesia. Walisongo J. Chem. [Internet]. 2023 Jul. 25 [cited 2025 Oct. 31];6(1):31-7. Available from: https://journal.walisongo.ac.id/index.php/wjc/article/view/14908