Thiti Rajsirisongsri และ Napassavong Osothsilp. (2007) Defect reduction in alloy casting industry. Chulalongkorn University:ม.ป.ท.Thiti Rajsirisongsri และ Napassavong Osothsilp. 2007. Defect reduction in alloy casting industry. ม.ป.ท.:Chulalongkorn University;Thiti Rajsirisongsri และ Napassavong Osothsilp. Defect reduction in alloy casting industry. ม.ป.ท.:Chulalongkorn University, 2007. Print.