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 May 10];4(2):122-7. Available from: https://journal.uny.ac.id/index.php/jsd/article/view/9087