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\bibitem{Bernard_etal1986} {\textquotedblleft}\textit{Classification of estuarine particles using automated electron-microprobe analysis and multivariate techniques}{\textquotedblright}. Bernard PC, Van Grieken RE, Eisma D, Environmental science and technology \textbf{20}, 467 (1986).   http://doi.org/10.1021/ES00147A005

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