Pharkphum Rakruam และ Suraphong Wattanachira. (2008) Silica fouling of utc-70 ultra low pressure reverse osmosis membrane in defluoridation of Chiang Mai basin groundwater. Chulalongkorn University:ม.ป.ท.Pharkphum Rakruam และ Suraphong Wattanachira. 2008. Silica fouling of utc-70 ultra low pressure reverse osmosis membrane in defluoridation of Chiang Mai basin groundwater. ม.ป.ท.:Chulalongkorn University;Pharkphum Rakruam และ Suraphong Wattanachira. Silica fouling of utc-70 ultra low pressure reverse osmosis membrane in defluoridation of Chiang Mai basin groundwater. ม.ป.ท.:Chulalongkorn University, 2008. Print.