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\bibitem{CostaDantas_etal1980} {\textquotedblleft}\textit{Trace elements in the atmospheric aerosols and soils in and around Recife, N.E. Brasil}{\textquotedblright}. Costa Dantas C, Moura de Amorim W, Van {\textquoteright}t dack L, Van Grieken R, Ciencia e cultura \textbf{32}, 1525 (1980)

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