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\bibitem{Injuk_etal1993} {\textquotedblleft}\textit{EDXRS study of aerosol composition variations in air masses crossing the North Sea}{\textquotedblright}. Injuk J, van Malderen H, Van Grieken R, Swietlicki E, Knox JM, Schofield R, X-ray spectrometry \textbf{22}, 220 (1993).   http://doi.org/10.1002/XRS.1300220410

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