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\bibitem{Hellemans_etal2019} {\textquotedblleft}\textit{LA-ICP-MS labels early medieval Tuscan finds from Siena and Donoratico as late natron glass}{\textquotedblright}. Hellemans K, Cagno S, Bogana L, Janssens K, Mendera M, Journal of Archaeological Science: Reports \textbf{23}, 844 (2019).   http://doi.org/10.1016/J.JASREP.2018.12.002

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