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\bibitem{Dekov_etal1997} {\textquotedblleft}\textit{Chemical composition of sediments, suspended matter, river and ground water of the Nile (Aswan-Sohag transvers)}{\textquotedblright}. Dekov VM, Komy Z, Araujo F, van Put A, Van Grieken R, The science of the total environment \textbf{201}, 195 (1997).   http://doi.org/10.1016/S0048-9697(97)84057-0

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