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\bibitem{Artaxo_etal1988} {\textquotedblleft}\textit{Composition and sources of aerosols from the Amazon basin}{\textquotedblright}. Artaxo P, Storms H, Bruynseels F, Van Grieken R, Maenhaut W, Journal of geophysical research \textbf{93}, 1605 (1988).   http://doi.org/10.1029/JD093ID02P01605

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