Sulistiyani S, Priyambodo E, Yogantari L. SILICA PURIFICATION FORM MERAPI VOLCANO SAND AS PHOTOVOLTAIC RAW MATERIALS. J.Sains Dasar [Internet]. 2016 May 20 [cited 2025 Jul. 4];4(2):122-7. Available from: https://jurnal.uny.ac.id/index.php/jsd/article/view/9087