Sirima Jeenpadiphat และ Duangamol Tungasmita. (2012) Esterification of free fatty acid and oil with fatty acid content over acidic heterogeneous catalyst. Chulalongkorn University:ม.ป.ท.Sirima Jeenpadiphat และ Duangamol Tungasmita. 2012. Esterification of free fatty acid and oil with fatty acid content over acidic heterogeneous catalyst. ม.ป.ท.:Chulalongkorn University;Sirima Jeenpadiphat และ Duangamol Tungasmita. Esterification of free fatty acid and oil with fatty acid content over acidic heterogeneous catalyst. ม.ป.ท.:Chulalongkorn University, 2012. Print.