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\bibitem{VanGrieken_etal1970} {\textquotedblleft}\textit{On the precision of oxygen determinations in steel by 14-MeVv neutron activation}{\textquotedblright}. Van Grieken R, Speecke A, Hoste J, Analytica chimica acta \textbf{52}, 275 (1970).   http://doi.org/10.1016/S0003-2670(01)80957-0

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