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\bibitem{Vandecasteele_etal1973} {\textquotedblleft}\textit{Systematic errors in 14-MeV neutron activation analysis for oxygen : part 1 : neutron and γ-ray attenuation effects}{\textquotedblright}. Vandecasteele C, van Grieken R, Gijbels R, Speecke A, Analytica chimica acta \textbf{64}, 187 (1973).   http://doi.org/10.1016/S0003-2670(01)82436-3

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