Vasinee Sombut และผู้แต่งคนอื่นๆ. (2018) Separation of Blue Ballpoint Pen Inks- A Comparison of Solvent Systems on Thin Layer Chromatography Techniques. <i>Suan Sunandha Science and Technology Journal</i>, <i>5</i>(1), 20 to 27.Vasinee Sombut และผู้แต่งคนอื่นๆ. "Separation of Blue Ballpoint Pen Inks- A Comparison of Solvent Systems on Thin Layer Chromatography Techniques". Suan Sunandha Science and Technology Journal 5 (2018):20 to 27.Vasinee Sombut และผู้แต่งคนอื่นๆ. Separation of Blue Ballpoint Pen Inks- A Comparison of Solvent Systems on Thin Layer Chromatography Techniques. Faculty of Science and Technology, Suan Sunandha Rajabhat University:ม.ป.ท. 2018.