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\bibitem{Moropoulou_etal2001} {\textquotedblleft}\textit{Correlation between aerosols, deposits, and weathering crusts on ancient marbles}{\textquotedblright}. Moropoulou A, Bisbikou K, Van Grieken R, Torfs K, Polikreti K, Environmental technology \textbf{22}, 607 (2001).   http://doi.org/10.1080/09593332208618236

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