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6. [Determination of writing age of blue ballpoint pen inks by high performance liquid chromatography]. Shi XF, Li XQ, Xu YJ, Wang JH, Wang YJ. Guang Pu Xue Yu Guang Pu Fen Xi; 2006 Sep; 26(9):1765-8. PubMed ID: 17112066 [Abstract] [Full Text] [Related]
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