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\bibitem{Adams+VanGrieken1975} {\textquotedblleft}\textit{Absorption correction for X-ray-fluorescence analysis of aerosol loaded filters}{\textquotedblright}. Adams FC, Van Grieken RE, Analytical chemistry \textbf{47}, 1767 (1975).   http://doi.org/10.1021/AC60361A040

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