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\bibitem{Nguyen_etal2009} {\textquotedblleft}\textit{Tracing the metal pollution history of the Tisza River through the analysis of a sediment depth profile}{\textquotedblright}. Nguyen HL, Braun M, Szaloki I, Baeyens W, Van Grieken R, Leermakers M, Water, air and soil pollution \textbf{200}, 119 (2009).   http://doi.org/10.1007/S11270-008-9898-2

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