PENGARUH LAMA PENGERINGAN SEKAM PADI TERHADAP TINGKAT KEMURNIAN SILIKA RICE HUSK ASH. JTM [Internet]. 2011 Oct. 31 [cited 2026 Mar. 21];1(1):21-5. Available from: https://jtm.itp.ac.id/index.php/jtm/article/view/381