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\bibitem{Spolnik_etal2004} {\textquotedblleft}\textit{Grazing-exit electron probe x-ray microanalysis of light elements in particles}{\textquotedblright}. Spolnik Z, Tsuji K, Van Grieken R, X-ray spectrometry \textbf{33}, 16 (2004).   http://doi.org/10.1002/XRS.656

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