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\bibitem{Verbueken_etal1984} {\textquotedblleft}\textit{Embedded ion exchange beads as standards for laser microprobe mass analysis of biological specimens}{\textquotedblright}. Verbueken AH, Van Grieken RE, Paulus GJ, De Bruijn WC, Analytical chemistry \textbf{56}, 1362 (1984).   http://doi.org/10.1021/AC00272A036

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