Differentiation of Red and Black Ballpoint Pen Inks using High Performance Thin Layer Chromatography and Gas Chromatography-Mass Spectrometry. AJFSFM [انترنت]. 7 يونيو، 2018 [وثق 6 نوفمبر، 2026];1(7). موجود في: https://journals.nauss.edu.sa/AJFSFM/article/view/442