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\bibitem{Eisma_etal1985} {\textquotedblleft}\textit{Loss of particulate organic matter in estuaries as exemplified by the Ems and Gironde estuaries}{\textquotedblright}. Eisma D, Bernard P, Boon JJ, Van Grieken R, Kalf J, Mook WG, Mitteilungen aus dem Geologisch-Pal{\"a}ontologischen Institut der Universit{\"a}t Hamburg \textbf{58}, 397 (1985)

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