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\bibitem{Rojas_etal1993} {\textquotedblleft}\textit{Dry and wet deposition fluxes of Cd, Cu, Pb, and Zn into the Southern Bight of the North Sea}{\textquotedblright}. Rojas CM, Injuk J, Van Grieken R, Laane RW, Atmospheric environment: part A : general topics \textbf{27}, 251 (1993).   http://doi.org/10.1016/0960-1686(93)90355-3

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