Wirawan R, Hadi Sutrisno H, Ambarwati D, Febriani A. Characteristic of Silica Level (SiO3) Resulted from the Extraction of Rice Husk Ash with KOH Solvent towards the Amount of Heating Time. IJET [Internet]. 2018 May 6 [cited 2025 Aug. 16];7(3.36):143-6. Available from: https://mail.sciencepubco.com/index.php/IJET/article/view/29095