Hernanda, S., Kusuma, G. J., Badhurahman, A., & Syaputra, R. (2023). The Effect of Fly Ash Ratio Addition as Layering Material Using Free Draining Column Leach Test Method on Laboratory Scale. EKSPLORIUM, 44(1), 41–48. https://doi.org/10.55981/eksplorium.2023.6707