Paweena Kumpang และ Usaneya Perngparn. (2013) PERCEPTION ABOUT HEALTH RISK AND HEALTH PROTECTION FROM CROPS AND FOREST FIRE SMOKE AMONG HIGH SCHOOL STUDENT IN NAN PROVINCE THAILAND. Chulalongkorn University:ม.ป.ท.Paweena Kumpang และ Usaneya Perngparn. 2013. PERCEPTION ABOUT HEALTH RISK AND HEALTH PROTECTION FROM CROPS AND FOREST FIRE SMOKE AMONG HIGH SCHOOL STUDENT IN NAN PROVINCE THAILAND. ม.ป.ท.:Chulalongkorn University;Paweena Kumpang และ Usaneya Perngparn. PERCEPTION ABOUT HEALTH RISK AND HEALTH PROTECTION FROM CROPS AND FOREST FIRE SMOKE AMONG HIGH SCHOOL STUDENT IN NAN PROVINCE THAILAND. ม.ป.ท.:Chulalongkorn University, 2013. Print.