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\bibitem{Annegarn_etal1977} {\textquotedblleft}\textit{Analysis of X-ray spectra excited by X rays, electrons, and protons in monazite}{\textquotedblright}. Annegarn HJ, Madiba CCP, Sellschop JPF, Genz H, Hoffmann DHH, Low W, Richter A, Van Grieken RE, Physical review : C : nuclear physics \textbf{16}, 379 (1977).   http://doi.org/10.1103/PHYSREVC.16.379

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