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\bibitem{Graham_etal2003} {\textquotedblleft}\textit{Composition and diurnal variability of the natural Amazonian aerosol}{\textquotedblright}. Graham B, Guyon P, Maenhaut W, Taylor PE, Ebert M, Matthias-Maser S, Mayol-Bracero OL, Godoi RHM, Artaxo P, Meixner FX, Lima Moura MA, d{\textquoteright}Almeida Rocha CHE, Van Grieken R, Glovsky MM, Flagan RC, Andreae MO, Journal of geophysical research \textbf{24}, 5 (2003).   http://doi.org/10.1029/2003JD004049

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