Chanidapa Padoongpitukchon และ Bunjerd Jongsomjit. (2013) Characteristic of gallium and boron modified ZrO2 on W/ZrO2 catalysts for esterification. Chulalongkorn University:ม.ป.ท.Chanidapa Padoongpitukchon และ Bunjerd Jongsomjit. 2013. Characteristic of gallium and boron modified ZrO2 on W/ZrO2 catalysts for esterification. ม.ป.ท.:Chulalongkorn University;Chanidapa Padoongpitukchon และ Bunjerd Jongsomjit. Characteristic of gallium and boron modified ZrO2 on W/ZrO2 catalysts for esterification. ม.ป.ท.:Chulalongkorn University, 2013. Print.