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Pionke, H.B.; Chesters, G.; Armstrong, D.E., Dual Column and Derivative Techniques for Improved Specificity of Gas-Liquid Chromatographic Identification of Organochlorine Insecticide Residues in Soils, Analyst, 1969, 94, 1123, 900-903, https://doi.org/10.1039/an9699400900 . [all data]