Iyenagbe B. Ugheoke และ Othman Mamat. (2012) A critical assessment and new research directions of rice husk silica processing methods and properties. <i>Maejo International Journal of Science and Technology</i>, <i>6</i>(3), 430.Iyenagbe B. Ugheoke และ Othman Mamat. "A critical assessment and new research directions of rice husk silica processing methods and properties". Maejo International Journal of Science and Technology 6 (2012):430.Iyenagbe B. Ugheoke และ Othman Mamat. A critical assessment and new research directions of rice husk silica processing methods and properties. Maejo University:ม.ป.ท. 2012.