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\bibitem{Muia+VanGrieken1991} {\textquotedblleft}\textit{Energy-dispersive X-ray fluorescence analysis of geological materials in borax beads using Tertian{\textquoteright}s binary coefficient approach combined with internal standard addition}{\textquotedblright}. Muia LM, Van Grieken R, X-ray spectrometry \textbf{20}, 179 (1991)

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