Nuttiga Ngamkitpinyo และ Apichat Imyim. (2010) Solid phase extraction of lead in water using triethylenetetramine-modified resin for determination by UV-visible and atomic spectrometries. Chulalongkorn University:ม.ป.ท.Nuttiga Ngamkitpinyo และ Apichat Imyim. 2010. Solid phase extraction of lead in water using triethylenetetramine-modified resin for determination by UV-visible and atomic spectrometries. ม.ป.ท.:Chulalongkorn University;Nuttiga Ngamkitpinyo และ Apichat Imyim. Solid phase extraction of lead in water using triethylenetetramine-modified resin for determination by UV-visible and atomic spectrometries. ม.ป.ท.:Chulalongkorn University, 2010. Print.