Apichaya Thiangtrong และ Somchai Pengprecha. (2015) PREPARATION OF CALCIUM OXIDE SUPPORTED RICE HUSK SILICA AS CATALYST FOR BIODIESEL PRODUCTION. Chulalongkorn University:ม.ป.ท.Apichaya Thiangtrong และ Somchai Pengprecha. 2015. PREPARATION OF CALCIUM OXIDE SUPPORTED RICE HUSK SILICA AS CATALYST FOR BIODIESEL PRODUCTION. ม.ป.ท.:Chulalongkorn University;Apichaya Thiangtrong และ Somchai Pengprecha. PREPARATION OF CALCIUM OXIDE SUPPORTED RICE HUSK SILICA AS CATALYST FOR BIODIESEL PRODUCTION. ม.ป.ท.:Chulalongkorn University, 2015. Print.