Natthawan Mameechai และ Fuangfa unob. (2009) On-line preconcentration of lead for the determination with flame atomic absorption spectrometry. Chulalongkorn University:ม.ป.ท.Natthawan Mameechai และ Fuangfa unob. 2009. On-line preconcentration of lead for the determination with flame atomic absorption spectrometry. ม.ป.ท.:Chulalongkorn University;Natthawan Mameechai และ Fuangfa unob. On-line preconcentration of lead for the determination with flame atomic absorption spectrometry. ม.ป.ท.:Chulalongkorn University, 2009. Print.