F. H. Azhar, “Simple Approach in Measuring the Synthesized Zeolite from Kaolin as Nutrient Retention for Mung Bean Growth”, emait, vol. 3, no. 2, pp. 52–59, Jan. 2023, Accessed: Jul. 17, 2024. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/emait/article/view/12650