Mara A, Wijaya K, Trisunaryati Mudasir W. Effect of Sulfuric Acid Treatment and Calcination on Natural Zeolites of Indonesia. ajc [Internet]. 2015 Oct. 5 [cited 2024 Jul. 3];28(1):11-4. Available from: https://asianpubs.org/index.php/ajchem/article/view/28_1_3