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\bibitem{Oh_etal2000} {\textquotedblleft}\textit{Characterization of aerosol particles collected at Kosan and 1100 Hill sites, Cheju Island, Korea, using ultrathin window EPMA}{\textquotedblright}. Oh K-Y, Ro C-U, Kim HK, Kim Y-P, Van Grieken R,  (2000)

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