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\bibitem{Kolaitis_etal1989} {\textquotedblleft}\textit{Determination of methanesulfonic acid and non-sea-salt sulfate in single marine aerosol particles}{\textquotedblright}. Kolaitis LN, Bruynseels FJ, Van Grieken RE, Andreae MO, Environmental science and technology \textbf{23}, 236 (1989).   http://doi.org/10.1021/ES00179A018

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