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\bibitem{Romano+Janssens2019} {\textquotedblleft}\textit{Preface to the special issue on: MA-XRF {\textquotedblleft}developments and applications of macro-XRF in conservation, art, and archeology{\textquotedblright} (Trieste, Italy, 24 and 25 September 2017)}{\textquotedblright}. Romano FP, Janssens K, X-ray spectrometry \textbf{48}, 249 (2019).   http://doi.org/10.1002/XRS.3047

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