Panee Subprasert. (2007) A coupling of superheated water and solid-phase extraction of N-nitrosamine from frankfurters /. Kasetsart University,:ม.ป.ท.Panee Subprasert. 2007. A coupling of superheated water and solid-phase extraction of N-nitrosamine from frankfurters /. ม.ป.ท.:Kasetsart University,;Panee Subprasert. A coupling of superheated water and solid-phase extraction of N-nitrosamine from frankfurters /. ม.ป.ท.:Kasetsart University, 2007. Print.