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Kong, R.C.; Lee, M.L.; Tominaga, Y.; Pratap, R.; Iwao, M.; Castle, R.N.; Wise, S.A., Capillary Column Gas Chromatographic Resolution of Isomeric Polycylic Aromatic Sulfur Heterocycles in a Coal Liquid, J. Chromatogr. Sci., 1982, 20, 11, 502-510, https://doi.org/10.1093/chromsci/20.11.502 . [all data]