Pornrat Kaewrueng และ Wattasit Siriwong. (2012) Risk assessment of heavy metal assosiated with dermal exposure in incense workers in small household factories at Roi-Et province, Thailand. Chulalongkorn University:ม.ป.ท.Pornrat Kaewrueng และ Wattasit Siriwong. 2012. Risk assessment of heavy metal assosiated with dermal exposure in incense workers in small household factories at Roi-Et province, Thailand. ม.ป.ท.:Chulalongkorn University;Pornrat Kaewrueng และ Wattasit Siriwong. Risk assessment of heavy metal assosiated with dermal exposure in incense workers in small household factories at Roi-Et province, Thailand. ม.ป.ท.:Chulalongkorn University, 2012. Print.