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\bibitem{Injuk_etal1992} {\textquotedblleft}\textit{Atmospheric concentrations and size distributions of aircraft-sampled Cd, Cu, Pb and Zn over the Southern Bight of the North Sea}{\textquotedblright}. Injuk J, Otten P, Laane R, Maenhaut W, Van Grieken R, Atmospheric environment : an international journal \textbf{26a}, 2499 (1992).   http://doi.org/10.1016/0960-1686(92)90102-Q

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