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\bibitem{Bruynseels+VanGrieken1985} {\textquotedblleft}\textit{Direct detection of sulfate and nitrate layers on sampled marine aerosols by laser microprobe mass analysis}{\textquotedblright}. Bruynseels F, Van Grieken R, Atmospheric environment \textbf{19}, 1969 (1985).   http://doi.org/10.1016/0004-6981(85)90023-X

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