Bunyat Suriyachai และ Tanawat Likitkererat. (2002) The study on the causes of death of people in Maejai district, Phayao province. Chulalongkorn University:ม.ป.ท.Bunyat Suriyachai และ Tanawat Likitkererat. 2002. The study on the causes of death of people in Maejai district, Phayao province. ม.ป.ท.:Chulalongkorn University;Bunyat Suriyachai และ Tanawat Likitkererat. The study on the causes of death of people in Maejai district, Phayao province. ม.ป.ท.:Chulalongkorn University, 2002. Print.