Un Mei Pan และ Wattasit Siriwong. (2009) Risk assessment for demal exposure of organophosphate pesticides in rice-growing farmers at Rangsit agricultural area, Pathumthani province, Central Thailand. Chulalongkorn University:ม.ป.ท.Un Mei Pan และ Wattasit Siriwong. 2009. Risk assessment for demal exposure of organophosphate pesticides in rice-growing farmers at Rangsit agricultural area, Pathumthani province, Central Thailand. ม.ป.ท.:Chulalongkorn University;Un Mei Pan และ Wattasit Siriwong. Risk assessment for demal exposure of organophosphate pesticides in rice-growing farmers at Rangsit agricultural area, Pathumthani province, Central Thailand. ม.ป.ท.:Chulalongkorn University, 2009. Print.