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\bibitem{Eltayeb_etal2001} {\textquotedblleft}\textit{Elemental composition of mineral aerosol generated from Sudan Sahara sand}{\textquotedblright}. Eltayeb MAH, Injuk J, Maenhaut W, Van Grieken RE, Journal of atmospheric chemistry \textbf{40}, 247 (2001).   http://doi.org/10.1023/A:1012272208129

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